438. Doctor. An old doctor, a young lawyer.
439. Dog. Every dog has his day.
440. Dog. A good dog deserves a good bone.
441. Dog. It's a bad dog that deserves not a crust.
442. Dogs bark. Dogs bark before they bite.
443. Done. If you wish a thing done, go; if not, send.
444. Doomsday. A thousand pounds and a pottle of hay is all one thing at doomsday.
445. Door. When one door shuts another opens.