Beginning in 1855, the Post Office provided a registry service to more securely move high-value matter through the mail system....

This envelope was probably mailed sometime around 1854, and unless the sender made a mistake in calculating the amount of postage needed,...

The Universal Postal Union (UPU), which was organized in 1874 and today is a specialized agency within the Union Nations, coordinates...

This plain looking cover was postmarked September 5, probably in 1860 based on the notation to the left, in Chicago. It then made its way...

This cover is likely from the early 1850s. I assume that is the case because this envelope has two stamps that help narrow the timeframe....