This puzzle seemed medium challenging to me. With the start Horace had made, I was able to chip away until most of the squares were filled before quitting to get some sleep. One thing is for sure, I found FRABJOUS (34D) neither splendid, nor humorous. Also, I have never heard of BIMINI, (1D: 1935-37 home for Hemingway), but I knew BRATPACKER had to be correct, as did IONOSPHERE, and the reast of the acrosses seemed to hold water, so in it went. DAPHNE (21A: "Scooby-Doo" girl) in the NE helped me break into that corner. Three down clues (48, 49, 50) made it possible for me to break open the long acrosses in the SE. 49D: Private reply, was one of my favorites. I tend to like the question mark clues, and 45D: Reserverd bars? (INGOTS) and 41D: Make It? (TAG) entertained. I also thought, BEANANGEL (51A: Spouse's entreaty starter, perhaps) was downright hilarious. That's what Horace said to me last night as he handed me the puzzle to complete before promptly falling asleep.