Sylvia meanwhile was enjoined to amuse herself in the company of Mrs. Threadgould's two boys, who were about her own age. It happened that at this time Willie Threadgould, the elder, was obsessed by secret societies, to which his brother Ernie and many other boys in the neighborhood had recently been initiated. Sylvia was regarded with suspicion by Willie until she was able to thrill him with the story of various criminal associations in France and so became his lieutenant in all enterprises. Most of the secret societies that had been rapidly formed by Willie and as rapidly dissolved had possessed a merely academic value; now with Sylvia's advent they were given a practical intention. Secrecy for secrecy's sake went out of fashion. Muffling the face in dusters, giving the sign and countersign, lurking at the corner of the road to meet another conspirator, were excellent decorations, but Sylvia pointed out that they led nowhere and produced nothing; to illustrate her theory she proposed a secret society for ringing other people's bells. She put this forward as a kind of elementary exercise; but she urged that, when the neighborhood had realized the bell-ringing as something to which they were more continuously exposed than other neighborhoods, the moment would be ripe to form another secret society that should inflict a more serious nuisance. From the secret society that existed to be a nuisance would grow another secret society that existed to be a threat; and finally there seemed no reason why Willie Threadgould (Sylvia was still feminine enough to let Willie think it was Willie) should control Shepherd's Bush and emulate the most remarkable brigands of history. In the end Sylvia's imagination banished her from the ultimate power at which she aimed. The Secret Society for Ringing Other People's Bells did its work so well that extra policemen were put on duty to cope with the nuisance and an inspector made a house-to-house visitation, which gave her father such a shock that he left Pomona Terrace the next day and took a room in Lillie Road, Fulham. "We have been betrayed," Sylvia assured Willie. "Do not forget to avenge my capture." Willie vowed he would let nothing interfere with his vengeance, not even if the traitor turned out to be his own brother Ernie. Sylvia asked if he would kill him, and reminded Willie that it was a serious thing to betray a secret society when that society was doing something more than dressing up. Willie doubted if it would be possible to kill the culprit, but swore that he should prefer death to what should happen to him. Sylvia was so much gratified by Willie's severity that she led him into a corner, where, having exacted his silence with the most solemn oaths, she betrayed herself and the secret of her sex; then they embraced. When they parted forever next day, Sylvia felt that she had left behind her in Willie's heart a romantic memory that would never fade.