Chapter

 1 I   |     Near him stood a boy, about fifteen years of age, who for some
 2 II  |      been carried to a depth of fifteen hundred or even of two thousand
 3 III |       lower gallery, a depth of fifteen hundred feet. This was the
 4 IV  |        of their cottage, buried fifteen hundred feet below Scottish
 5 IV  |    cottage! Though it is buried fifteen hundred feet under the earth,
 6 VI  |      course of the river Forth, fifteen hundred feet above.~“So
 7 IX  |     fall, through this space of fifteen hundred feet. He counted
 8 IX  |  unfortunate people, imprisoned fifteen hundred feet below the surface
 9 X   |     level with the workings, at fifteen hundred feet below the surface
10 XII |      was a maiden of the age of fifteen or sixteen years.~She gazed
11 XVI |    passing along at the rate of fifteen miles an hour, while at
12 XVII|      child was Nell. During the fifteen years, up to the time when
13 XVII|        was old then! He must be fifteen or twenty years older than
14 XVII| grandfather I have lived during fifteen years in the remote and