英语翻译

英语翻译
The film is narrated by a young man who suspects Dr.Caligari,a mountebank who is part of a traveling fair,of being responsible for a series of violent crimes.
请问上面这句话中,...who is part of a traveling fair 是说这个江湖医生是一个旅行集市的一部分吗?
请 copchen 提供一下这个英文解释的出处。