The first cover is cover from Indian Diggins, Cal. dated Nov 15, 1930. This cover has an almost perfectly centered on the nose cancellation.
The second cover is a nice PM1+PR1 paid reply postal cover (attached). It was first mailed in St. Louis, MO - hence the light cancellation starting on the "a" of "States" with a killer bar with slogan "World Fair St. Louis". The cancellation date is June 26, 1903. Since the St. Louis World's Fair was held in 1904, I can only surmise this was a promotional slogan. The addressee is in New Jersey.
The enigma, though, starts with cancellation on reverse which is an rpo cancellation for the New York & ???? dated Jun 27, 1903 on train 46. Apparently the cover went to Cleveland, Ohio where, on Jun 28, 1903, the maroon cancellation on the front was added stating "No such office in state ?????/Returned From Cleveland, Ohio".
The cover was received back in St. Louis on Jun 28, 1903 (the second cancellation on the front - without killer bars).
I have to do some research on this one.