If you want to say "indeed" in a particularly witty, old-fashioned way, use the adverb forsooth.
Sprinkle this word into your speech, and forsooth, your friends may think you sound Shakespearean: “Yes, forsooth mother, I shall walk the dog around the block.” Forsooth is an archaic adverb, mainly used in humorous contexts or on National Talk Like Shakespeare Day. Some etymologists believe it's a shortened form of “for in truth.”