“And stars give light! Voilà! Calm yourself, Hastings. Do not put on that air of injured dignity. Come, we will go to Montagu Mansions and make a few inquiries.”

I accompanied him, nothing loath. The Mansions were a handsome block of buildings in excellent repair. A uniformed porter was sunning himself on the threshold, and it was to him that Poirot addressed himself:

“Pardon, but could you tell me if a Mr. and Mrs. Robinson reside here?”

The porter was a man of few words and apparently of a sour or suspicious disposition. He hardly looked at us and grunted out:

“ No. 4. Second floor.”