In this latter part the rails were at first laid down on a curve, so as to bring the pharos into a symmetrical position with the jetty, then it advanced parallel to itself, following a slightly inclined plane. It was prevented by wedges from deviating during this ascent from a perpendicular line. The object of this twofold disposition was to veer the pharos round, and to raise it to a higher level—which, as we have seen, was an indispensable condition. The removal was eventually accomplished with so much success, and so little interruption to the business of the harbour, that the lamp was lighted in the evening at the usual hour.
TRANSPORTING A LIGHTHOUSE—SUNDERLAND.