I did find an old thread on the subject.

http://www.lighthousekeepers.com/cgi-bin/forumscgi/ultimatebb.cgi?ubb=get_topic;f=16;t=000054

The numbers and info on this thread are all over the place.If anyone can add to the information here in this new thread please do. Also please list the date 1863 or 1868.

THANKS!