This time, however, but little damage was done. Accortling to the
reports of the two temporary keepers, stationed on the stnicture, a
single wave, on the 18th of October, tore asunder one of the |)hites of
the top section of the caisson and bent up two others which had not
been bolted together, and were conse<iuently liable to such destruc-
tion. Two heavy boxes of bolts were blown from the upper floor,
the caging around one of the steam cranes was greatly damaged, and



THE ROTHERSAND LIGHT^TOWER. Ul

one of the keepers was riolently thrown by a wave to the floor of his
room as he attempted to leave it.
After this storm, which was followed by others of equal violence,
but little work could be done during the winter. The air-lock and
die machinery floor were raised so that the latter stood at a level
twenty feet above low water. The masonry and concrete wore also
raised twenty and forty inches respectively, and a Pintsch gas appa-
ratus with lantern and light visible six to seven nautical miles was
erected.
Work was commenced in February, 1884, and continued until
November, with many interruptions from wind and weather. The
required depth, seventy-three feet below low water, to which the
caisson was to be sunk, was attained on the 21st of May, 1884, one
year after the caisson was launched at the site, and at the same time
the level of the concrete and masonry had reached a height of three
feet four inches above low water. Over two thousand cubic yards
of sand, in addition to that which had leaked into the working-cham-
ber from without, was all removed from the latter by the sand blast.
