Why does the intruder call Gerrard 'a bit queer kind of a mystery man'?

Dear Student
The intruder said that while he was on the run, he reached a town called Aylesbury. There he saw Gerrard and overheard two men discussing him. Their discussion revealed that Gerrard was strange and mysterious hence he called Gerrard a bit queer kind of a mystery man.
Regards