Postcards are fragments of the past, like the postcard sent from a lonely son to a mother in Perth Amboy, New Jersey or a postcard from Niagara Falls written by a friend on a weeklong jaunt to Canada. These postcards and more can be found in the University of Maryland's has digitized collection of historic postcards. The University Libraries initiated the project, and while only a selection of the entire collection is available online, it remains quite impressive. Visitors can look at a demonstration pillory from Dover, canoes on the Charles River, or the Belton Chalet in Glacier National Park. Most of the images date from the first several decades of the 20th century, and visitors can browse through the offerings here by state. They are also welcome to use the search engine here as they see fit.