A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 37 Page 13

up some of those people whom I had formerly recognized, and make myself known. That would help us out of our scrape, without the knights. But I must proceed cautiously, for it was a risky business. I must get into sumptuous raiment, and it wouldn’t do to run and jump into it. No, I must work up to it by degrees, buying suit after suit of clothes, in shops wide apart, and getting a little finer article with each change, until I should finally reach silk and velvet, and be ready for my project. So I started.

But the scheme fell through like scat! The first corner I turned, I came plump upon one of our slaves, snooping around with a watchman.

I coughed at the moment, and he gave me a sudden look that bit right into my marrow. I judge he thought he had heard that cough before.