...hursday, the 17th instant, the sweepstakes for 3 year olds, two mile heats, was run at New Market, (near Petersburg,) it being the only race of the meeting. By agreement between Messrs. Doswell and Hare , the proceeds of the stake amounting to somewhat less than $1,000, are devoted to the hospitals for our sick and wounded soldiers — The winning colt was bred in North Carolina, and in considera...