The boys crept up behind rocks until within a few yards of the unsuspecting creatures.
"My Attainment of the Pole"
Frederick A. Cook
Watchful of every venture, they follow each turn of the cards, and, if a dollar be for one instant forgotten or left upon the table, an eager hand clutches and bears it off before the unsuspecting player has time even to recognize the thief.
"A Lady's Captivity among Chinese Pirates in the Chinese Seas"
Fanny Loviot
I assumed the character of an unsuspecting young man who from sheer respect neither hears, nor sees, nor understands anything, but she was evidently not duped by it.
"The Dead Lake and Other Tales"
Paul Heyse