"
"Sure, Mr. Hooper. Bill'll explain that to you. Professor Gray and he
worked out the exact resistance and the pressure."
And then Bill limped over; he had left his crutch on the hillside, and
he said, half laughing:
"This wall, Mr. Hooper, can't give way, even if it had the ocean behind
it, unless the stone and cement were mashed and crumbled by pressure.
The only thing that could break it would be about two days' hammering
with a sledge, or a big charge of blasting powder, and even that
couldn't do a great deal of damage."
"All right, me lad; you ought to know an' I believe you."
Mr. Hooper's genial good humor returned to him immediately; it was
evident that he was from time to time unpleasantly influenced by the
soft and ready tongue of his nephew. The old gentleman turned toward
home and disappeared; a short time afterward Thad came and stood near
where Gus was working, but he said nothing, nor did Gus address him.
Then the slim youth also departed and hardly half an hour elapsed before
down the hill came Grace and Skeets, the latter stumbling several times,
nearly pitching headlong and yet most mirthful over her own near
misfortune; but little Miss Hooper seemed unusually serious-minded. A
lively exchange of jests and jolly banter commenced between Skeets and
Gus, who could use his tongue if forced to; but presently Grace left her
laughing chum and came over to where Bill had resumed his inspection.
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