From the Mixed-Up Files of Mrs. Basil E. Frankweiler Chapter 6 Summary
Claudia even takes Sunday into consideration; after all, running away isn't an excuse to skip anything, not even church. They wake up early and go to a little chapel in the Middle Ages section of the museum to say their prayers.
After another peek at the angel (they just can't stay away), the museum guards come through, so Claudia and Jamie do what they do best—hide. They duck into the booth where the museum rents out the walkie-talkies for tours.
They check out the scene where the angel statue used to sit on a glorious stretch of velvet. Fancy shmancy.
Something's going on with the velvet: there are some rings on it. Was someone drinking beer? A soda, maybe? They look closer and realize that the rings are crushed in the shape of a symbol… that seems to have an "M" in it.
Cue the game show music signaling that they've found a clue.
Jamie realizes that he saw the same symbol yesterday while they were at the library, though he can't remember what book it was from (or what it means).
Claudia, feeling even better about this whole adventure, thinks that this statue (which she affectionately calls Angel… original, we know) is definitely the answer to the ennui that caused her to run away.
Without further ado, they set out to find what the symbol means. When the museum opens, they zip on over to the museum bookstore and find a book with the info they need—that the symbol they saw was Michelangelo's stonemason's mark. Bingo!
They splurge on a bus to go get brunch as they discuss what to do with their findings. How will they let the museum officials know this juicy information that they've excavated?
Claudia decides that the only thing to do is to write an anonymous letter to the museum officials. Then, when they are met with amazement and wonder, they will reveal themselves and be crowned as heroes of the art world.
Sounds like a plan.
With their quick memory, they remember a store that has a typewriter that you can use for free to test the product. They go there and type up as grown-up a letter as they can, explaining the stonemason's mark.
Then, they decide that they will spend some money on a P.O. Box so that they have a place where the museum officials can reach them.