Explaining the Points of the Harness. Photo by V. Gribay�doff. M. Pernette's overcoat and top hat are meant to exemplify correct dress for a Paris cab driver. The largest companies provided uniforms, but even the shabbiest of drivers usually wore a top hat as a kind of badge of the trade. Source: Outing magazine, vol. XLIII no. 3, December, 1903, p. 250.