Initially, the Waterways Post Card Collection consisted principally
of cards of the Erie Canal, with collections of additional New York
State canals such as the Oswego, Seneca, and Champlain Canals.
As demand for the course has remained steady, indeed increased,
the diminishing availability of canal-related cards posed a
potential problem. (Most cards are currently obtained on eBay,
and changing availability in geographic scope is an interesting
topic for another paper.) On the other hand, many of those canalrelated
cards that have become available are increasingly
distinctive.