"Well, what's the explanation?"
Antony waited until he had refilled and lighted his pipe before answering.
"What's the explanation? Well, let's leave it for a moment and take another look at the two brothers. In conjunction, this time, with Mrs. Norbury."
"Mrs. Norbury?" said Bill, surprised.
"Yes. Mark hoped to marry Miss Norbury. Now, if Robert really was a blot upon the family honour, Mark would want to do one of two things. Either keep it from the Norburys altogether, or else, if it had to come out, tell them himself before the news came to them indirectly. Well, he told them. But the funny thing is that he told them the day before Robert's letter came. Robert came, and was killed, the day before yesterday—Tuesday. Mark told Mrs. Norbury about him on Monday. What do you make of that?"
"Coincidence," said Bill, after careful thought. "He'd always meant to tell her; his suit was prospering, and just before it was finally settled, he told her. That happened to be Monday. On Tuesday he got Robert's letter, and felt jolly glad that he'd told her in time."
"Well, it might be that, but it's rather a curious coincidence. And here is something which makes it very curious indeed. It only occurred to me in the bath this morning. Inspiring place, a bathroom. Well, it's this—he told her on Monday morning, on his way to Middleston in the car."
"Well?"
