254 MEMORIAL—COCKBURN CHANNEL. May 1829. 
formation cannot be traced half the height; above is an im- 
mense heap of masses of rock, irregularly and wonderfully 
thrown together, many huge fragments overhanging, with 
apparently very little hold. This station was the most com- 
manding we had chosen during the survey, and answered well 
for the object we desired; which being attained, we returned 
on board, and I rejoiced when all were safe, for it was neither 
an easy, nor a pleasant enterprise.” 
A document, of which the following is a copy, was enclosed 
in a bottle and a strong outer case, and left at the summit of 
the mountain. 
(Copy-) 
This Memorial was left by the officers of H.M. Schooner 
Adelaide, while employed on a survey of the Magdalen, 
Cockburn, and Barbara Channels; and any person finding it 
is requested to leave the original document, and build the 
pile, under which it is placed, at least six feet higher. 
Signed this 16th day of May 1829, by 
W. G. Skyring, Lieut. and assist. surveyor of H.M.S. Beagle. 
Thomas Graves, Lieut. of H.M. Schooner Adelaide. 
James Kirke, Midshipman H.M.S. Beagle. 
Alex. Millar, Master assist. H.M.S. Adelaide. 
Benj. Bynoe, Assist. surgeon H.M.S. Beagle. 
Jno. Park, Assist. surgeon H.M.S. Adventure. 
God save the King. 
“In the Cockburn Channel,* the flood-tide sets to seaward ; 
* In the old Dutch charts, a passage was laid down near the place, 
and nearly in the direction of the Cockburn Channel, and named ‘ Jelou- 
zelt :’ but until some written authority can be produced to prove that this 
passage was explored, or, at the least, discovered by the person who gave 
the name of ‘ Jelouzelt’ to one of the almost innumerable openings in 
Tierra del Fuego, it does not appear that the inlet so called has any 
claim to our consideration, greater than that of the non-existing San 
Sebastian Channel,—or a number of other imaginary passages which 
must have been laid down, upon supposition only, in many old charts. 
The first person known to have passed through the Cockburn Channel 
was the mate of the Prince of Saxe Cobourg, who went in a boat (see 
page 66). It was afterwards passed by Mr. William Low, master of the 
Mercury, and has since been used by several vessels. 
