straight-backed

I mean, she was in this purple dress and he was straight backed.

One evening in the month of April, a slim, straight-backed girl stood in the veranda of a bungalow at Meerut.

Letitia Prall sat on a straight-backed chair, erect and still; but looking like a leashed tiger, ready to spring.

Sir John Meredith was sitting stiffly in a straight-backed chair by his library fire.

And these eyeglasses were affixed to the bridge of Sir John Meredith's nose, as he sat stiffly in the straight-backed chair.

Morley was ushered in and given one of the plain, straight-backed chairs with which the room was furnished.