I found an ancestor in the 1870 census living in Troy. So I went to the 1890 Troy City Directory at ancestry.com, and found the son working as a salesman at 3 Cannon Pl, with rooms at 56 Fourth. I then did a search to see who else was at 3 Cannon and there were over 500 hits! I tried the 4th St address and found over 100 hits. Can someone tell me what huge business was a 3 Cannon Place in 1890, and was 56 Fourth a big company boarding house? Thanks for any help/advice. Joan