Dick said nothing. It was too delicate a matter for an outsider to intrude upon. But the real delicacy of the situation was comprised in the boy’s riding companion. As though guessing his thoughts, she asked suddenly: “Is she a nice girl—Miss Bassano? I mean, is she one whom Ray should know?” “She is very charming,” he answered after a pause, and she noted the evasion and carried the subject no farther. Presently she turned the talk to her call on Ezra Maitland, and he heard her description without expressing surprise. “He’s a rough diamond,” he said. “Elk knows something about him which he refuses to tell. Elk enjoys mystifying his chiefs even more than detecting criminals. But I’ve heard about Maitland from other sources.” “Why does he wear gloves in the office?” she asked unexpectedly. “Gloves—I didn’t know that,” he said, surprised. “Why shouldn’t he?” She shook her head. “I don’t know . . . it was a silly idea, but I thought—it has only occurred to me since . . .” He waited. “When he put up his hand to smooth his beard, I’m almost sure I saw a tattoo mark on his left wrist—just the edge of it showing above the end of the glove—the head and eyes of a frog.” Dick Gordon listened, thunderstruck. “Are you sure it wasn’t your imagination, Miss Bennett?” he asked. “I am afraid the Frog is getting on all our nerves.” “It may have been,” she nodded; “but I was within a few feet of him, and a patch of light, reflected from his blotter, caught the wrist for a second.” “Did you speak to Johnson about it?” She shook her head. “I thought afterwards that even he, with all his long years of service, might not have observed the tattoo mark. I remember now that Ray told me Mr. Maitland always wore gloves, summer or winter.” Dick was puzzled. It was unlikely that this man, the head of a great financial corporation, should be associated with a gang of tramps. And yet—— “When is your brother going to Horsham?” he asked. “On Sunday,” said the girl. “He has promised father to come to lunch.” “I suppose,” said the cunning young man, “that it isn’t possible to ask me to be a fourth?” “You will be a fifth,” she smiled. “Mr. Johnson is coming down too. Poor Mr. Johnson is scared of father, and I think the fear is mutual. Father resembles Maitland in that respect, that he does not like strangers. I’ll invite you anyway,” she said, and the prospect of the Sunday meeting cheered her. Elk came to see him that night, just as he was going out to a theatre, and Dick related the girl’s suspicion. To his surprise, Elk took the startling theory very coolly.