Sinclair (Henry Harbinson) Papers, 1778-1937, bulk 1909-1914

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Summary

Title:
Henry Harbinson Sinclair Papers
Dates:
1778-1937, bulk 1909-1914
Creators:
Sinclair, Henry Harbinson, 1858-1914
Abstract:
This collection contains diaries, journals, and extensive personal and business correspondence of Henry Harbinson Sinclair (1858-1914), a hydro-electrical engineer and entrepreneur active in California from 1887 until 1914. Subject matter includes mostly business matters of the Great Western Power Company, Palmer Oil Company, Mt. Hood Railway and Power Company, etc.; diaries and notebooks concerning power plant inspection trips, mostly to the Kern River in California; the Pasadena Tournament of Roses Association; and the California to Honolulu yacht races. The collection also includes the papers of his son, Arthur W. Sinclair, pertaining to California Delta Farms, Inc.
Extent:
4.3 Linear Feet (8 boxes, 1 rolled item, 1 oversize folder)
Language:
English.
Preferred citation:

[Identification of item]. Henry Harbinson Sinclair papers, The Huntington Library, San Marino, California.

Background

Scope and content:

The Henry H. Sinclair papers number more than 1,600 items, including diaries, journals, newspaper clippings, and extensive personal and business correspondence. The complete date range is 1802-1937 (bulk dates 1909-1914). Subject matter includes mostly business matters of the Great Western Power Company, Palmer Oil Company, Mt. Hood Railway and Power Company, etc.; diaries and notebooks concerning power plant inspection trips, mostly to the Kern River in California; the Pasadena Tournament of Roses Association; the California to Honolulu yacht races. The collection also includes the papers of his son, Arthur W. Sinclair, pertaining to California Delta Farms, Inc. The collection also contains a diploma from Sinclair's membership in the American Institute of Electric Engineers and a manuscript, by Englishman Thomas Cowper, of calculations regarding a solar eclipse on June 24, 1778.

Biographical / historical:

Henry Harbinson Sinclair (1858-1914) was a hydro-electrical engineer and entrepreneur active in California from 1887 until 1914. Born December 22, 1858, Sinclair was a native of Brooklyn, New York. Sinclair married the former Agnes Rowley, also of Brooklyn. The couple had two children, a son, Arthur W. Sinclair, and a daughter, Marjorie Sinclair. At 15, he went to sea, and first visited California in 1874 after a voyage around Cape Horn. In three years of seafaring, he rose to the rank of Second Mate. Illustrated Redlands for 1897 states: "During 1877 and 1878, Sinclair took a scientific course at Cornell University. He then went into the shipping business in New York as an employee of the firm of Lovell & Sinclair, and afterwards became a partner in the firm of N.B. Sinclair & Son." Like so many Northeasterners of that era, he relocated to California for health reasons. He arrived in Redlands, in San Bernardino County's citrus-growing region, in 1887. He purchased thirty acres in the Lugonia tract to raise oranges. He served four years on the first Board of Trustees of the City of Redlands (incorporated in 1888). In 1892, Sinclair, with a number of other investors and businessmen, created the Redlands Electric Light and Power Company, which within a few years created the world's first three-phase electrical system. During his Redlands years, Sinclair also served as a director of the Lugonia Water Co., director of the South Fork Ditch Assn., president of the Southern California Power Co. (from 1897) and part-owner of the Terracina Hotel and related street railway (1892-1894). He was a director of both the California Power Co. and Southern California Edison and was at one time the general manager of the Edison Electric Co. Among Sinclair's avocations was yachting. In the 1890s and early 1900s, before his health failed, he sailed in a number of races and regattas in the Pacific. During the last few months before his death in 1914, Sinclair was arranging with a northeastern company to either charter or purchase another yacht. During the closing years of his life, Sinclair lived in Pasadena and was on the Board of Directors for the Tournament of Roses. He was also a member of the Bohemian Club, a San Francisco-based, men-only social club for "movers and shakers." Though he had homes first in Redlands, then in Pasadena, Sinclair spent much time traveling both to northern California and the East Coast by rail. He faced repeated health problems after 1900 and died in September of 1914.

Acquisition information:
Gift of Arthur W. Sinclair and Marjorie Sinclair, children of H.H. Sinclair, 1936.
Arrangement:

The collection is arranged in the following 4 series:

  1. Notebooks, Diaries, and Ledgers (Boxes 1, 7, 8)
  2. Loose Financial Records (Box 2)
  3. Miscellaneous Personal Items (Box 3 and Rolled Item 1)
  4. Manuscripts and correspondence (Boxes 4, 5, 6, Oversize folder 1)
Rules or conventions:
Describing Archives: A Content Standard

About this collection guide

Collection Guide Author:
Finding aid prepared by Charla M. DelaCuadra.
Date Encoded:
This finding aid was produced using ArchivesSpace on 2026-04-08 09:01:03 -0700 .

Access and use

Restrictions:

Open to qualified researchers by prior application through the Reader Services Department. For more information, contact Reader Services.

Terms of access:

The Huntington Library does not require that researchers request permission to quote from or publish images of this material, nor does it charge fees for such activities. The responsibility for identifying the copyright holder, if there is one, and obtaining necessary permissions rests with the researcher.

Preferred citation:

[Identification of item]. Henry Harbinson Sinclair papers, The Huntington Library, San Marino, California.

Location of this collection:
1151 Oxford Road
San Marino, CA 91108, US
Contact:
(626) 405-2191
reference@huntington.org
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