523 W Green St Ithaca

There was an 89 W Green St, likely at this location, in the late 1860s and 1870s. It does not appear that another building was on this location again until the mid-1910s when it was numbered 523 W Green St (523 W Green St first appears in the 1915-16 city directory).
Mary Allen was at 89 W Green in the 1869-70, 1872, 1873-74, 1875-76 city directories.  No one was listed at 89 W Green St in the 1876, 1878, and 1880-81 city directories, and the street directory section of the 1883-84 city directory lists a vacant lot (no number) between 87 and 93 W Green. 
No building at this location (89/523 W Green) on the 1889 Beers map, 1893 or 1899 Crandall map, or  1910 Sanborn map.

Source: Southside Historic District Proposal, Cynthia Carrington Carter, Emanuel J. Carter Jr. And Dr. Judith Wellman, City of Ithaca Department of Planning and Development, 2005.
523 West Green Street
89 W Green St
Description:
This is a 1 ½ story, stucco sided residence with a front facing gable. There is a large shed roofed dormer on the west side of the house. An integral porch with arched openings spans the front façade. It has been screened. The windows are paired, 1/1 double-hung sash. This house first appears on the 1919 Sanborn map.
Established African-American occupancy/ownership during the period of significance:
1930 William Perry, owner, janitor
At this location
1880 – Esther Brown  [Esther Brown was at 87 W Green in the 1880 and 1883 city directories (incorrectly listed at 89 W Green in the 1880 census)]
1872 – Mary Allen, widow of Henry Allen, and son John Allen 
1870 census – Mary Allen, 45 years old 
1870 census – Thomas Johnson, 89 years old – her father? 
1866 – Henry Allen, 26th USCT, discharged for a disability on 22 Feb. 1865