Source:Ordinance-1899-116
From Pittsburgh Streets
"An ordinance changing the name of Old avenue to Diamond street." Pittsburgh city ordinance, 1899, no. 116. Passed June 26, 1899; approved June 27, 1899. Ordinance Book 12, p. 451. Reprinted in the Pittsburg Post, July 8, 1899, p. 7 (Newspapers.com 86443786), and July 10, p. 3 (Newspapers.com 86443812).
