An 1857 cover to Mystic River.

The reverse of the previous cover, with the Ayer impression on the flap. Cherry Pectoral and Cathartic Pills are mentioned. Cherry Pectoral dates from 1841 and Cathartic Pills date from 1848.

A cover to Nova Scotia mailed in 1867, from a received handstamp on the reverse. Note the boxed Ayer return address.

An Ayer return address with no box. The docketing places this cover as sent in 1868.

An Ayer cover with the return address in a small, stylized belt. The pictorial stamp dates this in the 1869-70 period.

This cover, with an agent's name along with Ayer's in a large belt design, has an unusual manuscript cancel for the 1870's.

A registered cover from 1886, sent to the Ayer Company. It was some sort of return envelope, with the address printed in such as way as to look like handwriting.

This is a card, possibly inserted into a mailer to send brochures for distribution at a post office, probably in the late 1880's? Note that Ayer's Sarsaparilla Makes the Weak Strong.

An 1895 cover boasting that Ayer's Sarsaparilla was the only such drink sold at the 1893 Chicago World's Fair. One would think it was as a thirst quencher, as fairgoers were not likely to be worried about cures for scrofula, ringworm, sores, pimples, or ulcers while there.