We need not fear that any captive will die of thirst.

He has but to draw this bung and water will pour forth into this trough till he stops it again.

He can pour away the surplus down the pipe with the dust and such like.
"I trow whoever lives up here awhile will have no such bad housing.
And if we but get the place victualled this night, it will be ready for Brother Emmanuel whensoever he may need it.".