Not for lawns but ...
Next Wednesday 5 March is the spring Reading carriage sale. Since a carriage made by my forbears is up for sale (lot 26) I was studying the auction catalogue and noticed a horse reaper mower as lot 4.
It is described as a "HORSE-DRAWN MOWER with large metal wheels and implement seat".
I can't get along to take a better look, but the auction is free to enter and normally full of characters.