Bruce and Dick pay Professor Carter Nichols another visit in Batman #32 (October 1945). Prof. Nichols was introduced the previous year. He has the astounding ability to use hypnosis to send our two heroes into the past. This time they visit France in the 1600s and get involved with the Three Musketeers.
I always disliked the Batman time travel stories. They continue a gradual trend throughout the 1940s of making Batman less gritty and more fantastical.