Usage examples (4)

• As it happened, the thing worked with disconcerting abruptness as his untrained fingers fell hapchance on the spring.
• A hapchance native whom he presently encountered, furnished minute directions for reaching the Dockyard Station of the Southeastern and
• He was close upon the farther end when -- upon a hapchance impulse -- he glanced over the nearest guard-rail, down at the bed of the creek.
• And with the heel of his open hand he struck the man forcibly upon the chest, so that he reeled back, tripped over the hapchance foot of an innocent by-stander, and went...