Who said "Conscience is a curious thing."?

This quote is attributed to Justice Wargrave.

Conscience is a curious thing. - Justice Wargrave

"Conscience is a curious thing."

Justice Wargrave

Character in And Then There Were None

Buy "And Then There Were None" on Amazon

"Murder is justified when the victim deserves it."

"The guilty cannot hide forever."

"Justice must be served."

"Every man and woman is alone."