Origin of pillar box
Examples from the Web for pillar box
The letter was finished, and Guy went out to drop it in the pillar-box.Guy and Pauline|Compton Mackenzie
Drop that letter into the pillar-box and you will be worried by no more Asprays.Girls of the True Blue|L. T. Meade
To post the letter was the work of a minute or two, for there was a pillar-box a little way down the road.My Friend Smith|Talbot Baines Reed
And yet she still stood staring at the slit in the pillar-box.
The others had all posted their letters in the pillar-box just outside our gate.New Treasure Seekers|E. (Edith) Nesbit