Maybe I'm sharing something that is well known to SCF members, but in addition to stamp collecting, I'm also a history buff and enjoy reading some of the older newspapers/journals/books that I can get off of Google's digitized library.
I came across Vol. 1 No. 1 of "American Stamp Mercury" of 1867 ... that's 143 years ago! For interesting insight into the mid-19th century history of stamp collecting, it provides some interesting reading. There are about a half dozen issues in this link:
http://books.google.com/books?id=wm...ge&q&f=false