From the website of the Huntsville-Madison County Library
"Our photograph collection numbers over 10,000 positive photographic prints of Huntsville and Madison County, the oldest dating from the 1850's. They depict street scenes, buildings, churches, schools, cotton mills, portraits, and historic homes. Filed by subject heading, these photos are available to the public."
http://www.hpl.lib.al.us/departments/archives/There's a contact link at the bottom of the page, you might email them and ask if they have any photos of the Triana area.