London murderer, killed a woman for no other reason than that
she had thick ankles. Many years ago, I myself was on a case
where a man murdered an intimate friend because of a dispute
about a bet. My experience is that five murderers out of ten
act on the whim of the moment, without anything which, properly
speaking, you could call a motive at all.

Yours very cordially,
Paul Snyder

P. S. I don't think much of your Pickett theory. However, you're
in charge. I wish you luck.


IV

Young Mr. Oakes was not enjoying himself. For the first time in his
life, the self-confidence which characterized all his actions seemed to
be failing him. The change had taken place almost overnight. The fact
that the case had the appearance of presenting the unusual had merely
stimulated him at first. But then doubts had crept in and the problem
had begun to appear insoluble.

True, he had only just taken it up, but something told him that, for
all the progress he was likely to make, he might just as well have been
working on it steadily for a month. He was completely baffled. And
every moment which he spent in the Excelsior Boarding-House made it
clearer to him that that infernal old woman with the pale eyes thought
him an incompetent fool. It was that, more than anything, which made
him acutely conscious of his lack of success. His nerves were being