Also he was not at all displeased at enjoying this opportunity of impressing the Duke with his powers of analysis and synthesis.

He was unaware that, as a rule, the Duke's eyes did not usually twinkle as they twinkled during this solemn and deliberate progress through the house of M.Gournay-Martin.

M.
Formery had so exactly the air of a sleuthhound; and he was even noisier.
Having made this thorough examination of the house, M.Formery went out into the garden and set about examining that.

There were footprints on the turf about the foot of the ladder, for the grass was close-clipped, and the rain had penetrated and softened the soil; but there were hardly as many footprints as might have been expected, seeing that the burglars must have made many journeys in the course of robbing the drawing-rooms of so many objects of art, some of them of considerable weight.

The footprints led to a path of hard gravel; and M.Formery led the way down it, out of the door in the wall at the bottom of the garden, and into the space round the house which was being built.
As M.Formery had divined, there was a heap, or, to be exact, there were several heaps of plaster about the bottom of the scaffolding.
Unfortunately, there were also hundreds of footprints.