What clues does Lee give so she can realize who the countryman really is?

Scout tells the story of what happened outside to Atticus, the sheriff, and everyone else assembled. Mr. Tate notes the mark that Mr. Ewell's knife made in Scout's costume, and points out that Mr. Ewell meant to seriously harm or kill the children. When Scout points out the man who carried Jem, she finally takes a good look at him. He is very, very pale, with thin cheeks and feathery hair, and seems somewhat tense and nervous. She suddenly recognizes him as Boo Radley and, moved to tears, says "Hey, Boo."