Definition of "poney"

“[…] You will have the same walks to frequent, the same library to chuse from, the same people to look at, the same horse to ride.” “Very true. Yes, dear old grey poney. […]”

1814 July, [Jane Austen], chapter III, in Mansfield Park: […], volume I, London: […] T[homas] Egerton, […], page 52

[…] drawn by one or more poney or ponies, mule or mules, to carry 2.

1826, J. Whittemore, “Bankers.-⁠-⁠-List of Brighton Fares of Hackney Coaches, Flys, Pleasure Boats, and Bathing Machines.-⁠-⁠-[…]”, in Whittemore’s Royal Brighton Guide. Brighton and Its Environs; An Historical and Topographical Guide to the Visitor in Brighton, for 1826. […], Brighton: […] [T]he Author, at the Religious Book and Tract Depository, […], page 129

Poneys were this day provided for our use, with comfortable cloth saddles stuffed with wool […]

1829, The United Service Magazine, page 684