On the morning after Sophia's first essay in dentistry, therefore, Mrs. Baines was making her pastry in the underground kitchen. This kitchen, Maggie's cavern-home, had the mystery of a church, and on dark days it had the mystery of a crypt. The stone steps leading down to it from the level of earth were quite unlighted. You felt for them with the feet of faith, and when you arrived in the kitchen, the kitchen, by contrast, seemed luminous and gay; the architect may have considered and intended this effect of the staircase. The kitchen saw day through a wide, shallow window whose top touched the ceiling and whose bottom had been out of the girls' reach until long after they had begun to go to school. Its panes were small, and about half of them were of the "knot" kind, through which no object could be distinguished; the other half were of a later date, and stood for the march of civilization. The view from the window consisted of the vast plate-glass windows of the newly built Sun vaults, and of passing legs and skirts. A strong wire grating prevented any excess of illumination, and also protected the glass from the caprices of wayfarers in King Street. Boys had a habit of stopping to kick with their full strength at the grating. Forget-me-nots on a brown field ornamented the walls of the kitchen. Its ceiling was irregular and grimy, and a beam ran across it; in this beam were two hooks; from these hooks had once depended the ropes of a swing, much used by Constance and Sophia in the old days before they were grown up. A large range stood out from the wall between the stairs and the window. The rest of the furniture comprised a table--against the wall opposite the range--a cupboard, and two Windsor chairs. Opposite the foot of the steps was a doorway, without a door, leading to two larders, dimmer even than the kitchen, vague retreats made visible by whitewash, where bowls of milk, dishes of cold bones, and remainders of fruit-pies, reposed on stillages; in the corner nearest the kitchen was a great steen in which the bread was kept. Another doorway on the other side of the kitchen led to the first coal-cellar, where was also the slopstone and tap, and thence a tunnel took you to the second coal-cellar, where coke and ashes were stored; the tunnel proceeded to a distant, infinitesimal yard, and from the yard, by ways behind Mr. Critchlow's shop, you could finally emerge, astonished, upon Brougham Street. The sense of the vast-obscure of those regions which began at the top of the kitchen steps and ended in black corners of larders or abruptly in the common dailiness of Brougham Street, a sense which Constance and Sophia had acquired in infancy, remained with them almost unimpaired as they grew old.