Mysteriously missing mail

In 1961, the first version of the song Please Mr. Postman, the Marvelettes sang,

Please Mister Postman
Deliver de letter the sooner de better

At the time, a first-class postage stamp cost 4 cents. Adjusted for inflation, that would be 35 cents today. When the Beatles recorded their version in 1963, it cost a nickel to mail a letter. By the time The Carpenters cover of the song…