Anna Murray Douglass	With wife Helen Pitts (seated) and her sister Eva.

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Frederick Douglass 1850 census
Frederick Douglass 1860 census
Frederick Douglass, Elevator (San Francisco), June 5, 1868, 2
Frederick Douglass 1870 census
Frederick Douglass 1880 census
Ganter, Granville. "He Made Us Laugh Some": Frederick Douglass's Humor. African American Review, Vol. 37, No. 4 (Winter, 2003), pp. 535-552
Former slave and leading abolitionist Frederick Douglass revealed to be the most-photographed American of the 19th century (Daily Mail, Oct. 20, 2015)