There are 4 suits, 13 cards in each and 2 jokers, that is a total of 54.
Make sure you sign the log book which is under the watchful eye of one who once wielded an axe ready for battle, but sadly these days is more often mistaken for being suicidal.
You will need a felt tip or marker to sign the log, please write small and re-seal the cache properly.
Congratulations to Stucuk & TT for being FTF.