Frobisher
2 of the 7 encyclopedias on this shelf carry an entry for Frobisher. Both are reproduced below, so you can see where they agree and where they differ.
Collier's New Encyclopedia (1921)
MARTIN, an English navigator; born in Doncaster, Yorkshire, England, about 1536; was a mariner by profession. In search of a N. W. passage to India and under the patronage of the Earl of Warwick, he set sail with a fleet of three vessels from Deptford in June, 1576. After exploring different parts of the Arctic coast, and entering the strait that bears his name, he returned to England, bearing with him some black ore which is said to have been gold. In consequence of this discovery he was encouraged to make two more journeys, both of which proved fruitless. In 1558 he accompanied Drake to the West Indies. On board the "Triumph" he took part in the destruction of the Spanish Armada and was knighted for his bravery. In 1594 he served Henry IV. of France against the Leaguers and Philip II. of Spain, and while attacking a fort near Brest received a mortal wound. He died in Plymouth, England, Nov. 7, 1594.
Aiton's Encyclopedia (1910)
Martin, an English navigator. He was a native of Yorkshire, but of Welsh ancestry. In 1576 he commanded an expedition in search of the northwestern passage. One of his sailors brought home a piece of ore supposed to contain gold. Frobisher was sent out twice thereafter in search of the precious metal, but the ores brought home on his ships proved worthless. He served honorably in the conflict with the Great Armada. He died in 1594. Frobisher Bay on the southern end of Baffin Land was named in his honor.