The Corner House by Fred M. White

Lawrence was profoundly interested in what Prout had to say. The latter had given far more information than he had imagined.

"You have given me some valuable clues," he said. "In the first place we now know the real name of the murdered man. Strange that it should be the same as the fascinating Countess! And stranger still that our brilliant adventuress did not call herself something else when she engineered herself into society. But probably that is part of the reckless, audacity of her nature. It was very foolish because it jogs up the brains of a man like myself who has knocked about artistic and theatrical London for so long. And I distinctly recollect a Lalage, a dancer, who made a hit at the halls some seven or eight years ago."