"
The Geographical Society of Lisbon requested the navigator to deliver a
lecture. Though the members of the society lived right on the banks of
the river, they knew comparatively little about it, and Boyton's lecture
was of great scientific importance to them. Among other things, he
told them of the abutments and ancient masonry he had seen while going
through some of the wildest canyons, that could not be approached in any
way. This masonry, he thought, must be the remains of ancient Moorish
structures which stood there before the great earthquake had shaken up
and changed the surface of the country through which the Tagus flows.
An expedition sent out by the Society soon afterward, verified Boyton's
words and opinions.
Paul remained in Lisbon during Carnival week, and was entertained until
he grew weary of so much pleasure. He gave an exhibition in the Arsenal
de Marinha before the king and queen of Portugal, and received numerous
presents and decorations.
CHAPTER XVI.
Paul next went to Gibraltar. On arriving there, he expressed his
determination to cross the straits; but was given very little
encouragement. He was repeatedly warned against sharks which were
reported numerous in those waters. An English officer took him to the
rear of the place where cattle are killed for the army.
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