In 1900 Melvin E. Gillette was living with his family in Berwick, Warren Co., IL.
Glen L. Gillette, head household, b. IL Aug 1862, marr 9yrs, farmer.
Annetta, wife, b. IL July 1866.
Melvin E., b. IL Nov 1892.
Chester O., b. IL Jan 1898.
In 1910 Melvin was living in Chicago Ward 27, Cook Co., IL.
Matilda Bleick, head household, single, b. IL, 49, working out b_____.
John Bleick, nephew, b. IL, 19, single, nephew, ruler paper factory.
Melvin Gillette, boarder, b. IL, 17, stock clerk clothing.
In 1915 Melvin was living in Des Moines, Polk Co., IA.
Melvin E. Gillette, b. abt. 1893, IL, single, Baptist, father & mother b. IL. Source: Iowa State Census Collection 1836-1925.
In 1920 Melvin was living in Des Moines.
Melvin E. Gillette, b. IL, 27, salesman lumber.
Ruthe E., wife, b. MO, 27.
In 1930 Melvin and family were living in 9th A. D. Port Tract 30-1, Brooklyn, Kings, NY.
Melvin Gillette, b. IL, abt. 1893, marr @ 25, officer U.S. Army.
Ruth E., wife, b. MO, 37, marr @ 25.
Mary E., b. IA, 9.
Melvin E. Gillette 1892-1947, Vol 1: Jan 1946- July, 1949. New York: H. W. Wilson Co., 1949. Source: Biography & Genealogy Master Index (BGMI).
If you go to a library and find the BGMI collection of books, you will find more information about Melvin. You can ask the librarian because I too find the BGMI confusing.
You can request a coy of his obituary from the San Francisco Public Library, sfpl.org/index.php?pg-200000701 .