"Calling for a taxi," suggested Greg.
Meanwhile he got his engine started, and climbed into the seat beside her.
"Better move down the street a little way," she suggested. "He might catch sight of us here."
Greg obeyed. They waited in the next block. In due course a taxi-cab drew up before the little hotel, and the tall man got in, without baggage. The cab turned west in the side street. Greg followed at a furlong's distance.
This time the chase was not very long. They were led around the lower side of Union Square and down University Place. The first cab turned west in Ninth Street, and crossing Fifth Avenue drew up before a residence on the south side of the dignified, old-fashioned block beyond. Greg kept on to Sixth Avenue.
"Did you get the number?" she asked.
"Five-thirty."
"I thought so. That's the headquarters of the politicians. I have seen him address letters there."
Meanwhile the other cab having dropped its passenger had returned eastward.
"Go back to that house!" ordered the girl. Her eyes were shining like embers. A great excitement possessed her.