I was grateful to receive a note from a reader of twainsgeography.com
on a mispelled location.  My e-mail reply was returned as a user
unknown from a service called nevermind.com.  There is a small island,
named Procida, that Mark Twain visited.  I had it as Procidia.  In case
this reader is also a reader of Twain-L I'd like to express my thanks
for the headsup.