Mark set about his sport, yet felt that a sort of unfamiliar division had come into his mind and, while he brought two tiny-eyed flies from a box and fastened them to the hairlike leader he always used, there persisted the thought of the auburn girl—­her eyes blue as April—­her voice so bird-like and untouched with human emotion—­her swift, delicate tread.

He began to fish as the light thickened; but he only cast once or twice and then decided to wait half an hour.  He grounded his rod and brought a brier pipe and a pouch of tobacco from his pocket.  The things of day were turning to slumber; but still there persisted a clinking sound, uttered monotonously from time to time, which the sportsman supposed to be a bird.  It came from behind the great acclivities that ran opposite his place by the pools.  Brendon suddenly perceived that it was no natural noise but arose from some human activity.  It was, in fact, the musical note of a mason’s trowel, and when presently it ceased, he was annoyed to hear heavy footsteps in the quarry—­a labourer he guessed.

No labourer appeared, however.  A big, broad man approached him, clad in a Norfolk jacket and knickerbockers and a red waistcoat with gaudy brass buttons.  He had entered at the lower mouth of the quarries and was proceeding to the northern exit, whence the little streamlet that fed the pools came through a narrow pass.

The stranger stopped as he saw Brendon, straddled his great legs, took a cigar from his mouth and spoke.

“Ah!  You’ve found ’em, then?”

“Found what?” asked the detective.

“Found these trout.  I come here for a swim sometimes.  I’ve wondered why I never saw a rod in this hole.  There are a dozen half pounders there and possibly some bigger ones.”

It was Mark’s instinctive way to study all fellow creatures with whom he came in contact.  He had an iron memory for faces.  He looked up now and observed the rather remarkable features of the man before him.  His scrutiny was swift and sure; yet had he guessed the tremendous significance of his glance, or with proleptic vision seen what this being was to mean during the years of his immediate future, it is certain that he would have intensified his inspection and extended the brief limits of their interview.

He saw a pair of broad shoulders and a thick neck over which hung a square, hard jaw and a determined chin.  Then came a big mouth and the largest pair of mustaches Brendon remembered to have observed on any countenance.  They were almost grotesque; but the stranger was evidently proud of them, for he twirled them from time to time and brought the points up to his ears.  They were of a foxy red, and beneath them flashed large, white teeth when the big man talked in rather grating tones.  He suggested one on very good terms with himself—­a being of passionate temperament and material mind.  His eyes were grey, small, set rather wide apart, with a heavy nose between.  His hair was a fiery red, cut close, and of a hue yet more violent than his mustaches.  Even the fading light could not kill his rufous face.