ahorse

They're ahorse, and they should arrive in three hours and you can't possibly escape.

It had gone from bad to worse since then, and travelling on it these days either ahorse or afoot had become very unpleasant.

From every side, there was the sound of an arrival of men, both on foot and ahorse.

He then said that he could not very well give me ahorse, "with saddle and bridle also."

Need it be said that Kenneth Montagu was ahorse and after the coach within a few minutes.