Pepperbox

She had her knees up, resting her wrists on them; the pepperbox muzzle of a flechette pistol emerged from her hands.

Large, stately, and dark was its [the château's] outline against the dusky night-sky; there were pepper-boxes and tourelles and what-not fantastically going up into the dim starlight.

I also remember the old Royal Mews that stood on the site of the present trumpery National Gallery, with its too suggestive pepper-boxes; […]

Its architect, Wilkins, had the misfortune to be chosen to erect our much-abused National Gallery building, with its condemned "pepper-boxes" of cupolas; […]