Who was Hagar?

Hagar was an older slave who was put on the auction block with her son. They were to be sold as a pair.

The woman who had been advertised by the name of Hagar was a regular African in feature and figure. She might have been sixty, but was older than that by hard work and disease, was partially blind, and somewhat crippled with rheumatism. By her side stood her only remaining son, Albert, a bright-looking little fellow of fourteen years. The boy was the only survivor of a large family, who had been successively sold away from her to a southern market. The mother held on to him with both her shaking hands, and eyed with intense trepidation every one who walked up to examine him.