In the meantime they were working back and forth, in their progress along the East River, from the slums to the better residence districts. They bought newspapers at little stationery stores and worked up chance conversations with the clerks, particularly girl clerks, whenever they could find them.
"Because women have the eye for faces," Ronicky would say, "and, if a girl like Caroline Smith came into the shop, she'd be remembered for a while."
But for ten days they labored without a ghost of a success. Then they noticed the taxi stands along the East Side and worked them as carefully as they could, and it was on the evening of the eleventh day of the search that they reached the first clue.
They had found a taxi drawn up before a saloon, converted into an eating place, and when they went inside they found the driver alone in the restaurant. They worked up the conversation, as they had done a hundred times before. Gregg produced the picture and began showing it to Ronicky.
"Maybe the lady's around here," said Ronicky, "but I'm new in this part of town." He took the picture and turned to the taxi driver. "Maybe you've been around this part of town and know the folks here. Ever see this girl around?" And he passed the picture to the other.
The taxi driver bowed his head over it in a close scrutiny. When he looked up his face was a blank.
"I don't know. Lemme see. I think I seen a girl like her the other day, waiting for the traffic to pass at Seventy-second and Broadway. Yep, she sure was a ringer for this picture." He passed the picture back, and a moment later he finished his meal, paid his check and went sauntering through the door.
"Quick!" said Ronicky, the moment the chauffeur had disappeared. "Pay the check and come along. That fellow knows something."
Bill Gregg, greatly excited, obeyed, and they hurried to the door of the place. They were in time to see the taxicab lurch away from the curb and go humming down the street, while the driver leaned out to the side and looked back.
"He didn't see us," said Ronicky confidently.
"He's gone to tell somebody, somewhere, that we're looking for Caroline Smith. Come on!" He stepped out to the curb and stopped a passing taxi. "Follow that machine and keep a block away from it," he ordered.