This evening it was not I observed it, but judging by the impression made on the company, everyone observed that your conduct and deportment were not altogether what could be desired.
Anna, quietly walking her horse, a sturdy English cob with cropped mane and short tail, her beautiful head with her black hair straying loose under her high hat, her full shoulders, her slender waist in her black riding habit, and all the ease and grace of her deportment, impressed Dolly.
There are no more uses of "deport" identified with this meaning in the book.
Show samples from other sources
She launched into a lecture on deportment and dress at school.
The report said he "acted contrary to the NCAA principles of ethical conduct when he knowingly violated recruiting restrictions imposed by the NCAA" and "failed to deport himself with the generally recognized high standard of honesty."