Much of Rolls-Royce’s reputation—and indeed much of the marque’s unparalleled, enduring mystique—was established by the superb 40/50 HP Silver Ghost, introduced in 1906.

The origin of the model’s “Silver Ghost” moniker was in the nickname of Rolls-Royce managing director Claude Johnson’s personal automobile, which was painted silver with nickel trim.

Its popularity led several other wealthy owners to apply similar nicknames to their cars, much as one might name a grand estate or fine yacht.

Some of these have become among the most famous examples of the model, including “The Silver Dawn” and the car offered here, “The Silver Fairy,” nicknamed by original owner John Henry Thomas, a botanist and well-known photographer.

Mr.

Thomas took delivery of his car on 4 August 1909.

“The Silver Fairy” was built on the 134 ½-inch-wheelbase “short” chassis, resulting in considerably sportier and more dramatic proportions than the standard configuration.

Its body, a handsome Roi des Belges, wa...