I'm reading an article about magic tricks and it goes:
One of the most popular tricks was to make an object appear to leap with the aid of a hidden string. “This feat is the stranger if it be done by night,” suggested the English magician William Vincent, “a candle placed between the lookers on & the juggler for by that means their eyesight is hindered from discerning the conceit.”
I'm confused about the meaning of "stranger" here. As I know, a stranger refers to someone you don't know. But this definition doesn't seem to make sense here. What does "stranger" in this context mean?