Printers' Ink, Oct 8, 1925 (Vol. 133, No. 2): "Then You Will Be Able to Make Your Letters Live" by Charles R. Wiers
The pattern
This still sits in the public-domain pool. No pattern name yet.
Why it works
Charles Wiers teaching businessmen how to make sales letters talk like natural human speech. Eliminating stiff legal phrases turns written direct mail into friendly, persuasive conversations.
Steal this when
When training corporate teams to write direct mail copy that sounds like natural, spoken conversation.