If you enclose 15 cents I will also prepay all express charges.
I finally consented on condition that they prepay the freight, which they agreed to do.
When I am dead, post the letter in Tours, and prepay the postage.
It was not necessary in those days to prepay the postage, which was much dearer than it is now.
Prepay the reply, and get that reply back to me as soon as telegraph ...