Memorial and Biographical History of the Coast Counties of Central California. Henry D. Barrows and Luther A. Ingersoll, 1893. p. 336, PDF obtained from archive.org, 24 Apr 2021.
"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDKV-VG1 : 18 February 2021), Engracia Callaghan in entry for John D Callaghan, 1860. [Age 38 in Monterey Township, California with wife Engracia (26, California), children Maria (5), Juan (2), Henriqueta (0).]
"United States Census, 1870", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN6V-R3W : 10 March 2021), Mary E Callahan in entry for J D Callahan, 1870. [Age 49 with wife Mary E (38), children John M (13), Henrietta (10), Annie (9), Katie (8), Adalida (6), Rosie (4), Emmet (2), and D. Lewis.]
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6PZ-BL3 : 19 February 2021), E M Callahan in household of John D Callahan, San Francisco, San Francisco, California, United States; citing enumeration district ED 126, sheet 181D, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,076. [Age 63 with wife E M (45) and children Henrietta (20), Anna (17), Ida (14), Rosa (12), Emmet (11), and Daniel (9).]
"California Great Registers, 1850-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VYD6-YBS : 25 July 2019), John Downey Callaghan, 21 Aug 1888; citing Voter Registration, 852 Folsom, San Francisco, California, United States, county clerk offices, California; FHL microfilm 977,626. [Living in San Francisco, California as of 1888.]
"California Deaths and Burials, 1776-2000", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:HG4S-ZVZM : 4 February 2020), John Downey Callaghan, . [His birth year is estimated as 1813, which appears to be wrong, but his full name is give and he is listed as a physician.]
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