Clearly, when things like receipts must be sent, surface mail is the choice.
Airmail items typically arrive more quickly than surface mail, and usually cost more to send.
But don't send your originals by surface mail next time, okay?
The address for sending the application form by surface mail:
The county clerk had mailed it by surface mail, not airmail.
At the beginning airmail letters cost more than surface mail.
From 1950 to 1975, Mexico issued a series of small format definitive stamps with similar basic design for surface mail.
She writes him a letter and sends it surface mail instead of using a wiregram or making a phone call.
Information was distributed on floppy discs and via surface mail.
More are on the way by surface mail; I could only fit these in.