from The Century Dictionary and Cyclopedia
- n. A letter intended for a person residing within the delivery of the post-office where it is posted.
Sorry, no etymologies found.
One morning Paul found a drop-letter in the mail which greeted him daily.
A drop-letter came to me asking me to lecture here for a church debt.
After asking a few friends to sign an article of agreement to pay one dollar a year during five years for the orphan asylum, and mailing a couple of letters to Levi Coffin and Rev.E. M. Cravath, of Cincinnati, I took from the office a drop-letter from M.. Burton Kent, County Superintendent of the Poor, containing the following notice:
Each graf started with a large drop-letter capital.