The total amount of something remains the same.
In <em>The Case of the Defaced Painting</em>, we immediately encounter details that can help us solve the mystery. Part 1 of the story contains several clues. We learn that there is paint on the floor and on the chair that is close to the painting. We also learn that Mrs. Williams seems to be angry about the fact that her husband cares about the paintings so much. Finally, we also learn that Mrs. William is not wearing her wedding ring.
