I asked impatiently, for our commander sat stolidly upon his horse as though by no means sure what course he should pursue.
You sat upon your horse in the mouth of the pass and you faced death.
She sat upon her horse looking around, taking careful note of the surroundings.
She sat quietly upon her horse for a moment, waiting.
To the one who had been sitting quietly upon his horse, not speaking, not moving, waiting patiently for what he seemed to have known was coming.
Lascelles sat stock still upon his horse.
She sat straight-backed upon her horse, her chin lifted.
The knight sat upon his horse with its front feet raised; the bishop held his hands in prayer.
Two swift hours passed, and now the king sat upon his white horse, glimmering in the half light.
Raistlin sat upon his black horse within the shadows of the great gates.