If he had had a doubt it was dispelled by the fact that Father Roland had left a light burning in there.

It was not chance.
There was a purpose to it all: the light, the audible dropping of the heavy key, the swift going of the Missioner.

David made himself sure of this before he rose from his chair.

He waited perhaps five minutes.

Then he picked up the key.
At the door, as the key clicked in the lock, he hesitated.