A Connecticut Yankee in King Arthur's Court, Part 3.
I saw that she was a good housekeeper, for while she talked she kept a corner of her eye on the servants to see that they made no balks in handling the body and getting it out; when they came with fresh clean towels, she sent back for the other kind; and when they had finished wiping the floor and were going, she indicated a crimson fleck the size of a tear which their duller eyes had overlooked.