Meanings of black imperial in English

Da Souza tugged at his little black imperial, and moved uneasily about.

His slight black imperial was trimmed to a point, his moustache upturned with a distinctly foreign air.

He has black eyes, black imperial, and looks like a South American, which, by the bye, I think he is.

Now a fragile, short young Frenchman, with an extremely pale face ending in a thin black imperial, appeared at the entrance.

His seat was almost immediately seized by a small man dressed in brown, a man with a black imperial and moustache curled upwards.

Then his lean, white fingers meditatively adjusted his tie, and even more meditatively stroked at the narrow black imperial, before he spoke again.

He gently stroked his small black imperial as he talked, but his eyes behind their gold eye-glasses never wavered in their mild regard of her.