ght, when the ship was moored. During our walking
to and fro a striking enlargement of the disk of Jupiter was
observed, whenever the heated air of the funnel came between us and
the planet. On passing away from the heated air, the flat dim disk
would immediately shrink to a luminous point. The effect was one of
visual persistence. The retinal image of the planet was set quivering
in all azimuths by the streams of heated air, describing in quick
succession minute lines of light, which summed themselves to a disk of
sensible area.

At six o'clock next morning, the gun at the Signal Station on the
summit of the rock, boomed. At eight the band on board the
'Trafalgar' training-ship, which was in the harbour, struck up the
national anthem; and immediately afterwards a crowd of mite-like
cadets swarmed up the rigging. After the removal of the apparatus
belonging to the Gibraltar party we went on shore. Winter was in
England when we left, but here we had the warmth of summer. The
vegetation was luxuriant--palm-trees, cactuses, and aloes, all ablaze
with scarlet flowers. A visit to the Governor was proposed, as an act
of necessary courtesy, and I accompanied Admiral Ommaney and Mr.
Huggins to 'the Convent,' or Government House. We sent in our cards,
waited for a time, and were then conducted by an orderly to his
Excellency. He is a fine old man, over six feet high, and of frank
military bearing. He received us and conversed with us in a very
genial manner. He took us to see his garden, his palms, his shaded
promenades, and his orange-trees loaded with fruit, in all of which he
took manifest delight. Evidently 'the hero of Kars' had fallen upon
quarters after his own heart. He appeared full of good nature, and
engaged us on the spot to dine with him that day.

We sought the town-major for a pass to visit the lines. While
awaiting his arrival I purchased a stock of white glass bottles, with
a view to experiments on the colour of the sea. Mr. Huggins and
myself, who wished to see the rock, were taken by Captain Salmond to
the library, where a model of Gibraltar is kept, and where we had a
useful preliminary lesson. At the library we met Colonel Maberly, a
courteous and kindly man, who gave us good advice regarding our
excursion. He sent an orderly with us to the entrance of the lines.
The orderly handed us over to an intelligent Irishman, who was
directed to show us everything that we desired to see, and to h