horse block

a step or block of stone, wood, etc., for getting on or off a horse or in or out of a vehicle.

Origin of horse block

First recorded in 1745–55

I stood on the horse-block, watching it, my mind busy with many thoughts.

Memoirs of Service Afloat, During the War Between the States |Raphael Semmes
John and Eva sat down on a log that had served as a horse-block.

Up Terrapin River |Opie P. Read
Mr. Sanderson was at work in an apple orchard near by, and waved his hand to them as the machine drew up to the horse-block.

The Rover Boys in Business |Arthur M. Winfield
It was brought here from Haddenham, where it had been used as a horse-block, by Mr. Bentham.

Bell's Cathedrals: The Cathedral Church of Ely |W. D. Sweeting

Listening a moment longer, he patted the post as he had done the horse-block, and stole towards the bridge.

Belford's Magazine, Vol 2, December 1888 |Various