"I am compelled to be a valetudinarian." Our cab was awaiting us outside, and our programme was evidently prearranged, for the driver started off at once at a rapid pace.
Thaddeus Sholto talked incessantly, in a voice which rose high above the rattle of the wheels.
"Bartholomew is a clever fellow," said he.

"How do you think he found out where the treasure was?
He had come to the conclusion that it was somewhere indoors: so he worked out all the cubic space of the house, and made measurements everywhere, so that not one inch should be unaccounted for.

Among other things, he found that the height of the building was seventy-four feet, but on adding together the heights of all the separate rooms, and making every allowance for the space between, which he ascertained by borings, he could not bring the total to more than seventy feet.

There were four feet unaccounted for.

These could only be at the top of the building.