William was in show business. here is a passport application. then his likely SSDI with a death in 1963. The year of birth is off by 1 year and the month and day is correct. That happens about as many times as not. The SSDI might be the right date - and the information on the application incorrect, since he seemed to have a bit of trouble deciding between 1874 and 1872.
Passport Application
issued January 2, 1917
American Counsulate General, Montreal
Wm Henry Dobbins
born 13 September 1872 [1874 was overwritten], in Mong Gaup Valley, NY
father is a naturalized citizen and is deceased
living at 347 West 58th NY, is an actor,
temporarily sojourning at Montreal
plans to go to Australia for theatrical work and return within a year
identifying document included: affidavit of brother Frank J Dobbins
sworn 30 December 1916
stamped January 2, 1917
picture of William
[shares same address in NYC as Frank in 1918]
the next passport application in the book is from John James Bourke, also an actor, also headed to Australia. Mr Bourke testified to the truth of William Dobbins information.
https://www.familysearch.org/ark:/61903/1:1:QVJP-9R7L-------------
United States Social Security Death Index
Age: 90
Given Name: William
Surname: Riano
Birth Date: 13 Sep 1873
State: New York
Event Date: Nov 1963
https://www.familysearch.org/ark:/61903/1:1:JTBW-5WRso this might be him:
William Riano
Birth 1874
Death 1963 (aged 88–89)
Burial
Kensico Cemetery
Valhalla, Westchester County, New York, USA
Memorial ID 105838983
https://www.findagrave.com/memorial/105838983-------
and maybe him in 1925 in NYC, age 51.
https://www.familysearch.org/ark:/61903/1:1:KSQX-PY6