魔鬼之足，藏匿于阴影中，时刻威胁着无知者的心灵。少年阿宾全文免费阅读

　　Whilst in Cornwall Holmes is approached by the local vicar to determine how Brenda Tregennis died whilst sitting in a room, playing cards with her two brothers, who were struck down with dementia as a result. The trail leads to an African adventurer and a deadly root known as the Devil's Foot.