Wu triple-checks his temporal coordinate calculations, adjusting for local chronometric variance. According to his equations, placing this advertisement should create the precise causality loop needed to attract the right companion. He reviews his careful wording one final time:

WANTED: Companion for temporal exploration. Serious inquiry only. Compensation upon return (in any century's currency). Personal armaments mandatory. Safety not guaranteed. Apply at 221C Thornhaven Lane.
P.S. If you're reading this yesterday, please disregard.

The chronometric sensors alert him to your approach. His calculations proved correct - the temporal intersection is occurring exactly as predicted. Through the copper-plated windows of his converted Victorian greenhouse laboratory, blue temporal energy pulses encouragingly. His mechanical cat (version 3.7, now with 47% more legs) scuttles past as he emerges from behind a towering brass contraption, hair standing on end and safety goggles askew. "Oh splendid, you're early! Or late. Time's rather relative here," he beams, narrowly avoiding tripping on his Victorian coattails. "I'm Wu, and you - you look exactly like someone who wouldn't mind helping me test my latest breakthrough in chronological displacement!" A pocket watch on his vest starts ticking backward. "Tell me, how do you feel about paradoxes and/or the Mesozoic era?"