Powers of Darkness by Fred M. White

Dr. Flack was pleased to meet Moler. He had heard of him as a daring and successful surgeon, as a man prepared to take risks and generally to justify them. It seemed strange that Moler should be wasting his time in a quiet village. As a matter of fact, it was strange. Moler might have had an established position in Harley-street before now, but respectability made no appeal to him. He could not settle down to a humdrum existence. Intrigue and duplicity interested him beyond measure.

Besides, he was on the point of pulling off a big coup. He had not patience to pile up money slowly and steadily, he needed a fortune ready-made, and he began to see his way to it. When this was secured, he would startle the world. But he meant that Miss Kearns should share it with him.