Bob, what information are you exactly looking for on your great grandfather Henry Edward Karn (my great grandfather also). Your grandfather William was my granduncle as my grandfather was Charles his brother. I have some information on the Oshawa Drug Store and photographs.... My records indicate that HEK married Mary Lortz on Jan. 28, 1880 in Listowel ON before moving down to Woodstock ON. Four of their children were baptized in Listowel - Flora Mary, Henry George, Mary Ernestine and Bertha Mary Karn