'You'll want prepayment, no doubt!
"What's Mine's Mine V1"
George MacDonald
We would call the attention of merchants and indeed all who pay postage, to the advertisement of the postmaster, who offers to sell stamps of the value of five cents each for the prepayment of letters.
"History of the Postage Stamps of the United States of America"
John Kerr Tiffany
That from and after April 1st, 1855, prepayment by stamps, stamped envelopes or in money is compulsory.
"History of the Postage Stamps of the United States of America"
John Kerr Tiffany