“I’ve never taken a fingerprint,” said Murphy. “I’m not at all sure how it’s done.”

“The science has been around for centuries, but only in the past few years is it catching on with law enforcement. The impressions on an object—in this case, the cartridge—are created by the ridges on the skin. When the object is handled, the perspiration and oils are transferred to it, leaving an impression of the fingertip-ridge pattern. To record the prints, a fine powder like ground-up graphite from a pencil is dusted on the surface. Then a piece of tape is used to lift the print for study.”

Murphy sipped at his coffee. “I’ll give it a try.”

Bell thanked the sheriff and walked down the stairway. Three hours later, he was on a train back to Denver.

15

CROMWELL’S CHAUFFEUR DROVE THE 1906 ROLLS Royce Brougham, made by the London coach maker Barker, with its six-cylinder, thirty-horsepower engine, from the garage to the front of the palatial Nob Hill mansion Cromwell had designed himself and constructed from white marble blocks cut and hauled by railroad from a quarry in Colorado. The front end had the appearance of a Greek temple, with high fluted columns, while the rest of the house was more simply designed, with arched windows, and a cornice that crowned the walls.

While the chauffeur, Abner Weed, a stony-faced Irishman whom Cromwell hired more for his experience as a wrestler than his expertise behind the wheel of an automobile, stood patiently by the Rolls out front, Cromwell waited for his sister in his study, sprawled comfortably on a leather sofa, listening to Strauss waltzes on an Edison cylinder phonograph. He was conservatively dressed in a dark wool suit.

After listening to “Voices of Spring,” he changed cylinders and played Tales from the Vienna Wood. The cylinders played two minutes of music each.

Cromwell glanced up from the machine as his sister came into the room wearing a doeskin dress that fell around her nicely curved calves.

“A bit risqué, aren’t we?” he said, eyeing her exposed flesh.

She spun around, swirling the skirt and showing off her legs up to midthigh. “Since we’re going slumming on the Barbary Coast, I thought I’d dress like a soiled dove.”

“Just be sure you don’t act like one.”

He rose from the sofa, turned off the phonograph, and held up her coat so she could slip into it. Even with his shoe lifts, he stood the same height as his sister.

Then he followed her through the large, intricately carved front doors to the drive and the waiting Rolls-Royce. Abner, attired in his liveried uniform with shiny black boots, stood at attention, holding open the rear door. The Rolls was a town car, with an enclosed passenger compartment, the chauffeur in the open air with nothing but the windshield to protect him. As soon as Cromwell’s sister was settled, he instructed the driver where to go. Abner shifted gears and the big car rolled silently over the granite stones laid in the street.