318A Plaza Road North was designated #318 Plaza Road North in the census, as no unit letters were used.² The occupants of 318A Plaza Road North were
     in 1930-1: Walter S Platt^2,1
     in 1933-7: Emil H Zachmann ^3,4,5
     and in 1939: William E. Harden⁶
     in 1941 it was listed as vacant.⁷

Walter S Platt was born in 1901 in New Jersey.² He married Gladys in 1922.² Walter S Platt appeared on the 1930 Census as the head of household at 318A Plaza Road North, with Gladys as wife.² The monthly rent was $56.-.² Walter S Platt was a salesman (building features(?)) in New York. In 1933 he operated the Ridgewood Auto Laundry in the rear of 100 Chestnut Street in Ridgewood.^2,1,3 He owned a radio in 1930.² Walter S Platt and Gladys Platt moved before 1933 to Ridgewood.³

Emil H Zachmann married Annie H.³ Emil H Zachmann was a salesman.³ Mrs Annie H Zachman and Mrs Patricia B Russell were instructors in resp. German and French in the Adult Education courses, sponsored by the Carnegie Foundation and the American Association for Adult Education.⁸ Emil H Zachmann and Annie H Zachman moved before 1939 to South America.⁶