~ The Chicago Blue Book, 1908
via Internet Archive

A female private detective in 1908? Miss Cora M. Strayer, I lift my glass to you. I’ll bet you were an interesting person to know.

Note: Apparently Mr. Geo. S. Holben, Supt. Criminal Dept., was shot by a disgruntled former employee in 1910. (Los Angeles Herald, December 06, 1910).

According to the 1913 edition of the Chicago Blue Book, Miss. Strayer’s Detective Agency was still in business, although Mr. Holben’s name no longer appeared in the advertisement.

~ Modern Dancing, by Mr. and Mrs. Vernon Castle, 1914
via Internet Archive

~ Canadian Y.M.C.A. in London, c. 1914 - 1918
via Library and Archives Canada
(click to enlarge)

Illustration of System 45C colour capabilities by Hal Anderson (1981).

Apple Lisa (1983).