The following list of elements contains a secret message:
Mercury,
Lead,
Thulium,
Polonium,
Polonium,
Actinium,
Americium,
Bismuth,
Tantalum,
Iridium,
Mercury,
Osmium,
Thulium,
Americium,
Lead,
Tantalum,
Lutetium,
Hafnium,
Polonium
Every one of these elements maps to a character somehow...
This link will probably be very helpful.