"Well?" said Bill, as they sat down underneath a convenient tree.
"Talk away."

"I had many bright thoughts in my bath this morning," began
Antony. "The brightest one of all was that we were being damn
fools, and working at this thing from the wrong end altogether."

"Well, that's helpful."

"Of course it's very hampering being a detective, when you don't
know anything about detecting, and when nobody knows that you're
doing detection, and you can't have people up to cross-examine
them, and you have neither the energy nor the means to make
proper inquiries; and, in short, when you're doing the whole
thing in a thoroughly amateur, haphazard way."

"For amateurs I don't think we're doing at all badly," protested
Bill.

"No; not for amateurs. But if we had been professionals, I
believe we should have gone at it from the other end. The Robert
end. We've been wondering about Mark and Cayley all the time.
Now let's wonder about Robert for a bit."

"We know so little about him."

"Well, let's see what we do know. First of all, then, we know
vaguely that he was a bad lot--the sort of brother who is hushed
up in front of other people."