A very informative exposition, by Ron and Eunice Shanahan, of various types of postal markings,
with many examples: Bishop Marks, Free Franks, Ship Letters, Milage Marks, Too Late, and much more.
Admittedly more social history than postal history, nevertheless this fine display of old letters -
from 1717 to 1859 - with commentary by Ron and Eunice Shanahan is fascinating for the light it
sheds on the lives and concerns of our ancestors.