Read it through once

At last, the top of the staircase was gained, and they stopped for the third time. There was yet an upper staircase, of a steeper inclination and of contracted dimensions, to be ascended, before the garret story was reached. The keeper of the wine-shop, always going a little in advance, and always going on the side which Mr. Lorry took, as though he dreaded to be asked any question by the young lady, turned himself about here, and, carefully feeling in the pockets of the coat he carried over his shoulder, took out a key.