What does the ransom note demand in the novel, God Save the Child?

Healy shows Spenser two sheets of paper, each inside a transparent cover. The first is a hand-drawn comic strip featuring a voluptuous woman, dressed in a mini-skirt and seated at a bar. The ransom amount is fifty-thousand dollars, and the instructions must be followed exactly, and there is a warning to "be careful." Trask says that the pictures were a way for the kidnappers to hide their identities, but Healy refuses to comment. The instructions are specific. Margery is to have the money in a book bag at the corner in front of a riding stable, and any problems will result in Kevin's head being chopped off.