Harry W. Treat Family Collections, 1893-1977

Overview of the Collection

Treat family
Harry W. Treat Family Collections
1893-1977 (inclusive)
1903-1920 (bulk)
2 boxes
Collection Number
1946.404 (accession), 2005.19 (accession)
Two collections include loose photographs and two scrapbooks containing newspaper clippings, articles, portraits, souvenirs and other materials relating to the Harry Whitney Treat family of Seattle
Museum of History & Industry, Sophie Frye Bass Library

P.O. Box 80816
Seattle, WA
Telephone: 2063241126 x102
Access Restrictions

The collections are open to the public by appointment.


Biographical NoteReturn to Top

Harry Whitney Treat was born in Monroe, Wisconsin on December 13, 1865. His parents were descended from a direct line of English settlers and Harry Treat was an avid, lifelong Anglophile. After attending Cornell University and Harvard Law School, he worked for Marshall Field Department Store before establishing his own real estate firm, Helliwell and Treat. In 1896, he married Olive Marion Graef, the daughter of Charles Graef, a wealthy champagne importer.

Harry and Olive Treat traveled on business to Europe in 1903 and 1904 with their first child Priscilla. In 1906, the family moved to Seattle where Treat established the Pacific Trust Company, specializing in real estate development. Their second daughter Loyal was born in Seattle, and the Loyal Heights residential neighborhood was named after her. Within a few years, Harry Treat was a millionaire and became a colorful high society figure in Seattle. He and Olive sponsored lavish charity benefits and outdoor social events. The Treats had a flair for the theatrical and their Queen Anne mansion and Loyal Heights farm were filled with vintage English coaches, period costumes, hunting dogs and purebred English Hackney horses.

Shortly after arriving in Seattle, Harry Treat began purchasing hundreds of acres of forested land in the northern part of the city, including a long stretch of pristine waterfront. He acquired this real estate at a time when most speculators were concentrating on the empty tide flats south of downtown. The Ballard area was impoverished and lacked public transportation, so the potential for residential development was overlooked. To remedy this problem, Harry Treat established an electric trolley line called the Loyal Railway and used it promote the suburbs of Ballard, Loyal Heights and Loyal Beach. He also created a magnificent waterfront park accessible by trolley called Golden Gardens, which his family later donated to the City of Seattle. The logging baron Frederick Stimson acquired the northeast portion of Harry Treat’s new Loyal Heights neighborhood and planned The Highlands, a luxury development with five-acre home sites arranged around a golf course.

Harry Treat was active in Seattle civic affairs until his sudden death at age 57. He was the president of the Washington State Arts Association, Seattle Tennis Club, and Seattle Horseshow Association, and a member of the Chamber of Commerce. On July 30, 1922, he died in an automobile accident near Chilliwack, Canada. After the marriage of her daughters Priscilla and Loyal, Olive Treat lived in the Olympic Hotel until her death in 1945 at the age of 76. She was a member of the first board of the Orthopedic Hospital.

Content DescriptionReturn to Top

The two collections include scrapbooks, photographs and ephemera related to the family of Harry Whitney Treat. See notes for each collection below for more detailed descriptions.

Use of the CollectionReturn to Top

Alternative Forms Available

View selections from the collection in digital format by clicking on the camera icons in the inventory below.

Restrictions on Use

The Museum of History & Industry is the owner of the materials in the Sophie Frye Bass Library and makes available reproductions for research, publication, and other uses. Written permission must be obtained from MOHAI before any reproduction use. The museum does not necessarily hold copyright to all of the materials in the collections. In some cases, permission for use may require seeking additional authorization from the copyright owners.

Administrative InformationReturn to Top

Location of Collection

12a.3.12 (1946.404)

Location of Collection

2a.1.9 (2005.19)

Detailed Description of the CollectionReturn to Top

1946.404:  Harry W. Treat Family Scrapbooks, 1893-1940Return to Top

2 scrapbooks

The collection consist of two scrapbooks containing newspaper clippings, photographs and ephemera related to Harry W. Treat and his family. Photographs include portraits of family members, interiors and exteriors of the Treat home, and Treat family social and recreational activities. Clippings document the business and social life of Harry Treat and family. Much of one of the scrapbooks is devoted to ephemera collected on a family trip to Europe in 1903.

Gift of the Treat family; received in May 1946.

Each scrapbook has a handwritten note inside the front cover from Treat's daughter, donor Loyal Treat Nichols, marking the donation of the scrapbooks to Mrs. Frederick Swanstrom for the Seattle Historical Society in April 1946.

Container(s) Description Dates
1946.404.c: Harry W. Treat family scrapbook #1
1 scrapbook12 x 17 in.
The first of two scrapbooks has a dark green cover with "News Cuttings" embossed in gold. The scrapbook material spans the years 1893 to 1912; the majority of the material is from 1903. Most items are securely attached to the pages, some with handwritten captions and notations. Contents include Seattle newspaper clippings detailing the social life and business activities of Harry Treat; photographs of Treat family members, including homes, horses, carriages, and parks; photographs of Seattle street scenes and various recreational activities; and entertainment programs and magazine articles documenting the social life of the Treat family. The scrapbook also includes a large collection of ephemera and other materials from the family's 1903 trip to Europe, including postcards, photographs, correspondence, diary pages, maps, hotel bills, menus, tickets and souvenirs.
1893-1912; 1903
1946.404.d: Harry W. Treat family scrapbook #2
1 scrapbook14 x 9 in.
The second scrapbook has a red-marbled, unmarked cover. The first section of the scrapbook is primarily Seattle newspaper clippings relating to the social activities of the Treat family. The scrapbook photographs include equestrian activities, Seattle parks, Treat home interiors and exteriors, and formal portraits of Treat family members.

2005.19:  Harry W. Treat family photographs and ephemera, 1896-2005Return to Top

11 folders

Gift of Patsy Treat Nichols Schweitzer; received in March 2005.

Photographs of Treat family member and Treat home on Queen Anne, and clippings related to the Treat family.

Container(s) Description Dates
2005.19.1: Decorated automobile at Golden Potlatch parade
Kneisle (photographer)
Caption on photo: Auto Parade, Golden Potlatch, 1912 Handwritten identifications by Loyal Treat Nichols on verso: "In back seat: Phoebe Nell Tidmarsh and Priscilla Treat. Front seat: Fred, our Japanese driver, Loyal and Grandmother Priscilla (Gould) Treat"
2005.19.2: Harry Treat jumping horse "Grey Gander" without saddle or bridle, Seattle Hunt Club
2005.19.3: Priscilla and Loyal Treat in coach at Olympic Riding Club
Handwritten caption taped to photo: "Taken in 1932 by Times photographer at Olympic Riding Club in one of our old coaches"
2005.19.4: Costumed group of woman and eight girls at the "Kirmess" charity pageant
The "Kirmess" carnival, a major Seattle social event with extravagant stage shows, was a fundraising event for Seattle's Children's Orthopedic Hospital.
5 circa 2005
2005.19.6: Marriage portrait of Harry and Olive Treat.
Modern copy (probably an inkjet digital print) of original photo
2005.19.7: Four-horse carriage in front of Treat home
Modern copy (probably an inkjet digital print) of original photo
2005.19.8: Entrance hall of Treat home at West Highland Drive, Queen Anne
Copy negative
circa 1908
2005.19.9: Dining room of Treat home on Queen Anne
Copy negative
circa 1908
2005.19.10: Treat home on West Highland Drive
Copy negative
circa 1902
2005.19.11-14: Copies of photographs
4 items
These appear to be copies of original prints which have been reproduced and printed on inkjet printer, and one modern snapshot copy. Includes family photos, equestrian event, and the Treat daughters at a pageant at University of Washington.
circa 1915
2005.19.15: Photograph of people with horse teams and dogs outside farm in Loyal Heights
Cut from a scrapbook. Handwritten on page: "Loyal Heights farm--party and hunting dogs"
circa 1910
2005.19.16-.26: Ephemera
Newspaper clippings and magazine articles related to the Treat family.

Names and SubjectsReturn to Top

Personal Names

  • Nichols, Loyal Graef Treat, 1906-2004
  • Treat, Harry Whitney, 1865-1922
  • Treat, Olive Graef, 1869-1945
  • Treat, Priscilla Grace, b. 1902

Family Names

  • Treat family

Geographical Names

  • Queen Anne (Seattle, Wash.)
  • Seattle (Wash.)

Form or Genre Terms

  • Ephemera
  • Photographs
  • Scrapbooks