That barrel was in the Williams' cellar now, and the cellar was providentially supplied with "outside doors," so that it could be visited without going through the house.

Sam and Penrod set forth for the cellar.
They returned to the stable bulging, and, after a discussion of Whitey's digestion (Sam claiming that eating the core and seeds, as Whitey did, would grow trees in his inside) they went back to the cellar for supplies again--and again.

They made six trips, carrying each time a capacity cargo of apples, and still Whitey ate in a famished manner.
They were afraid to take more apples from the barrel, which began to show conspicuously the result of their raids, wherefore Penrod made an unostentatious visit to the cellar of his own house.

From the inside he opened a window and passed vegetables out to Sam, who placed them in a bucket and carried them hurriedly to the stable, while Penrod returned in a casual manner through the house.

Of his sang-froid under a great strain it is sufficient to relate that, in the kitchen, he said suddenly to Della, the cook, "Oh, look behind you!" and by the time Della discovered that there was nothing unusual behind her, Penrod was gone, and a loaf of bread from the kitchen table was gone with him.
Whitey now ate nine turnips, two heads of lettuce, one cabbage, eleven raw potatoes and the loaf of bread.