Multi-Family Construction: Duplex with #320 S Plain St; (Incorrect-duplex with 316-see under Other) 
Roof of Main Structure: Shingle; 
Additional Sections: Section 1, back (W), 1.5 story, shingle roof / Section 2, right of Section 1 (N), 1 story, shingle roof; 
Outbuildings: ; 
Porches: ; 
Other: 1910 Sanborn mistakenly labeled this duplex 318-320 but it was 316-318 (see 1899 Crandall and 1919 Sanborn) ;

Source

Library of Congress, Geography and Map Division, Sanborn Maps Collection

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Buildings

50 1/2 S Plain St Ithaca318 S Plain St Ithaca (as of 1899)