here he also learnt all the Arabs knew
respecting the southern part of Africa, viz. that the sea was navigable to
the south-west (and this indeed their countrymen believed, when the author
of the Periplus visited them); but they knew not where the sea terminated.
At Sofala also Covilham gained some information respecting the island of
the Moon, or Madagascar. He returned to Cairo, by Zeila, Aden, and Tor. At
Cairo, he sent an account of the intelligence to the king, and in the
letter which contained it, he added, "that the ships which sailed down the
coast of Guinea, might be sure of reaching the termination of the
continent, by persisting in a course to the south, and that when they
should arrive in the eastern ocean, their best direction must be to enquire
for Sofala and the island of the Moon."

"It is this letter," observes Dr. Vincent, "above all other information,
which, with equal justice and equal honour, assigns the theoretical
discovery to Covilham, as the practical to Diaz and Gama; for Diaz returned
without hearing any thing of India, though he had passed the Cape, and Gama
did not sail till after the intelligence of Covilham had ratified the
discovery of Diaz." One part of the instructions given to Covilham required
him to visit Abyssinia: in order to accomplish this object, he returned to
Aden, and there took the first opportunity of entering Abyssinia. The
sovereign of his country received and treated him with kindness, giving him
a wife and land. He entered Abyssinia in 1488, and in 1521, that is, 33
years afterwards, the almoner to the embassy of John de Lima found him.
Covilham, notwithstanding he was as much beloved by the inhabitants as by
their sovereign, was anxious to return to Portugal, and John de Lima, at
his request, solicited the king to grant him permission to that effect, but
he did not succeed. "I dwell," observes Dr. Vincent, "with a melancholy
pleasure on the history of this man,--whom Alvarez, the almoner, describes
still as a brave soldier and a devout Christian;--when I reflect upon what
must have been his sentiments on hearing the success of his countrymen, in
consequence of the discovery to which he so essentially contributed.
_They_ were sovereigns of the ocean from the Cape of Good Hope to the
straits of Malacca: _he_ was still a prisoner in a country of
barbarians."

It might have been supposed, that after it had been ascertained by Diaz
that the southern promontory of Africa co