Big, full Boston 3cts postmark along with red PAID. But the real story here is the contents of the envelope...a letter from John F. Eliot, Boston pharmacist, affiliated with prominent Boston pharmacy Brewers, Stevens and Cushing (Samuel N. Brewers, James F. Stevens, H. W. Cushing) requesting the recipient, who may have been his son or father, to go to Bruno and Cargill at Maiden Lane to get the product mentioned on a slip of paper which was pinned to the note. The product, N.W. Seat's Electric Negative Fluid, was for the "suppression of fever in every form and stage." We could not find any online reference to this product. According to the note, Eliot wants the fluid for a sea captain who "says it is the very best thing in the world for the purposes named--he is sure of it--for 'somebody told him so.'"

Back of envelope contains an embossed seal of Brewers, Stevens and Cushing. Envelope is fragile, but content is outstanding.