The Count's Chauffeur by William le Queux

Count Bindo's retreat near Winchester proved to be a small, rather isolated house near Kingsworthy. It stood in its own grounds, surrounded by a high wall, and at the rear was a very fair garage, that had been specially constructed, with inspection-pit and the various appliances.

The house was rather well furnished, but the only servant was a man, who turned out to be none other than the yellow-haired young fellow who had been introduced to me at the Cecil as "Mr. Henderson."