When a rich man comes into the shop, the girl wonders if he is her mysterious benefactor.

They - someone - some mysterious benefactor - had given him back his identity!

Soon after he is shown reporting to a mysterious benefactor.

Part of him, he understood, was simply too curious not to go along with his mysterious benefactor.

Then I thought of my mysterious benefactor and the $36,000.

He realized that his mysterious benefactor was a man of intuition.

My mysterious benefactor is not the only one who's in this game.

No answer from the others, the solid, practical beings who would not speak against the mysterious benefactor.

Why hadn't our mysterious benefactors done a full repair job on the Captain?

You had to give it to the Suliban- or rather, their mysterious benefactors.