Yves-Joseph de Kerguelen-Trémarec
In 1767 he sailed near Rockall, or Rokol. Although he may not have approached within sight of it, or even within 150 miles, he appears to have had good information regarding it. His charted position for it was only 16 miles North of its actual position and he accurately described its appearance and the nearby Helen's Reef, "East of Rokol, ¼ league away, there is a submerged rock over which the water breaks". Afterwards he published a map of the area in 1771.
Discovery of the Kerguelen Islands
In early 1772, he sailed to the Antarctic region, in search of the fabled Terra Australis, where he discovered the isolated Kerguelen Islands north of the continent and took possession of various territories for France. He was accompanied by the naturalist Jean Guillaume Bruguière.
In his report to King Louis XV, he greatly overestimated the value of the Kerguelen Islands; consequently, the King sent him on a second expedition in late 1773 through early 1774, again reaching Kerguelen. By now, it had become clear that these islands were desolate and quite useless, and certainly not the Terra Australis. On his return, Kerguelen-Trémarec was sent to prison.
During the French Revolution, he was seen as a victim of the Ancien Régime and restored to his position, taking part in the Battle of Groix. He died in 1797 as a Rear Admiral and commander of the port of Brest.
- Kerguelen-Trémarec, Yves-Joseph (1796). Relation d'un Voyage dans la Mer du Nord. ISBN 2-84265-129-4.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- Kerguelen-Trémarec, Yves-Joseph (1796). Relation des combats et des évènements de la guerre maritime de 1778 entre la France et l'Angleterre (in French). Imprimerie de Patris. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- Fisher, James (1957) . Rockall. London: Country Book Club.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
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