(This post was published in the May-June 2023 issue of First Days (No. 470, pp. 42-49), the journal of the American First Day Cover...

Today, first-class mail is often carried by planes, but before 1977, air mail was a distinct service from first-class mail, and a sender...

This cover (Figure 1) was postmarked in Conway, New Hampshire on August 15, 1859, and was addressed to Colonel Thomas E. Chickering of...

Today, the smallest postcard or envelope that you can mail through the US Postal Service has to measure at least 5 inches long and 3-1/2...

This cover was postmarked in Augusta, Georgia on June 6, 1944. That was the date Allied forces landed at Normandy, a day known as...