Little bit of help
 

Many years ago I purchased a 1910 philadelphia athletics cabinet photo that was in pieces and is in terrible condition but does come with a letter from the hall of fame wanting this cabinet photo for their collection. Im looking for a way of displaying this piece with the letter in possibly in a frame and want to know how I could do this? I really don't want to put a ton of money into this i paid i believe $50 for it on eBay about 10-15 years ago. Would it be possible to glue it down on a piece of acid free board and then frame it? Thanks guys you have always been a great help

Maybe
 

Maybe just use archival tape on the back only to put it back together….. then it’s not permanently degraded.