Unlike some other crossword bloggers, I don't usually post the times it took me to do the puzzle, probably because I'm not that proud of them. But I did today's puzzle in 25 minutes and 55 seconds, which is not a record for me, but it's pretty close. I did have four letters wrong, two of which I feel bad about. For me, there are three types of errata (there's a good crossword word for you) I make in puzzles: the first is just a careless mess-up, the second is one where I guessed too soon and I would have gotten the correct answer if I'd just spent a few more seconds on it. Both of these I berate myself for. But the third type is where two words I just don't know and will never dredge up from my brain no matter how long I sit there chewing on my pencil intersect. Today it was ten-across: "Concord Hymn" writer's inits and 11 down: Early Chinese dynasty -- sorry, never heard of the "Concord Hymn" and as for Chinese dynasties, I can do Han and Ming (a merciless time in Chinese history) and that's about it. I guessed RHE and HEI, trying to use logic ("It's not RTE or they'd've clued it as "route" and it's not PEI, he's an architect.") The correct answer is RWE (for Ralph Waldo Emerson) and the WEI dynasty.
I also missed Kathryn ERBE of some TV show cuz I have never heard of her and it intersected with RONDO, a "Repetitive musical piece" another term I am unfamiliar with. So without some hella luck guessing I was destined to miss two letters. The other two mistakes, however, were entirely my fault, and I don't want to talk about them.