I discovered that a book published at least as long ago as 1972 that shows 1239 First Street can be read on Project Gutenberg. It is The Great Days of the Garden District by Martha Ann Brett Samuel.
Like the Internet Archive, Project Gutenberg also has made hard to find books available in digital format. One difference is that the books are usually ones you will have to do at least some scrolling to read. Since the book is available to read on Project Gutenberg, I've put a new link on Exploring New Orleans Architecture. When you click the book, it will open the book on the Project Gutenberg website.
One thing Michael Curry did during the restoration of the Mayfair house (in the book, The Witching Hour) was to show Rowan pictures of the houses surrounding hers. Michael took Rowan on a "tour" via history books. So I thought it would be an interesting addition to the Parlor.