The 1918 and 1921 Polk city directories both listed William Jackson and his 2nd wife Cora (Kuhns) Jackson as the residents of 2627 Collingwood.  Mr. Jackson was the general manager of Joseph Jackson & Sons.  His biography appeared in Toledo & Lucas County Vol. 2 on page 563 and Maumee Valley, Toledo and the Sandusky Region Vol. 4 on page 617.  Their daughter was Nan Betty Jackson.  Their live-in domestic according to the 1920 Census was Florine Dull and the 1930 Census was Ina McKelvey.