Hello,
Hopefully a simple question to answer.  When collecting in the field I
place shells in zip lock bags pending cleaning, and use a 'permanent
marker' to annotate location number.  These numbers on the bags often
faded, so I used the same marker to note the number on a slip of paper
and put that into a small ziplok bag and insert into the larger bag.
Often any moisture getting into the small bags also faded those
numbers.  I know museums have written labels that are always in liquid
in their 'wet' collections.  What kind of marker, what kind of paper
(that you can easily obtain and is easy to use in the field)?

Thanks.

Alan Gettleman
Merritt Island, FL