He drew a sigh of relief as they allowed it to pass unchallenged. Their course was a zigzag one designed to bring them as quickly as possible to Oxford Street. When at length they turned into it, proceeding in an easterly direction, Tommy slightly increased his pace. Little by little he gained upon them. On the crowded pavement there was little chance of his attracting their notice, and he was anxious if possible to catch a word or two of their conversation. In this he was completely foiled; they spoke low and the din of the traffic drowned their voices effectually.