“Thank you, sir, but the way by the subterranean passage would take too much time and I have none to lose.”

Cromwell placed his hand on a hidden handle and opened a door so well concealed by the tapestry that the most practiced eye could not have discovered it.

It closed after him with a spring. This door communicated with a subterranean passage, leading under the street to a grotto in the garden of a house about a hundred yards from that of the future Protector.

It was just before this that Grimaud had perceived the two men seated together.

D’Artagnan was the first to recover from his surprise.

“Mordaunt,” he cried. “Ah! by Heaven! it is God Himself who sent us here.”