yes , big , dark hair , beard , woolly hat - seemed scruffy - shoes worn down at the heel slightly - possibly a rough sleeper - query alcohol problems ... ' 'with all due respect , mrs wingford , ' said christopher , offended on big dave 's behalf by this woman who thought she could diagnose alcohol problems by looking at someone 's shoes , 'i do n't see how you can diagnose alcoholism by looking at someone 's shoes .