Corporal Walter Grose, November, 1850.
Colour-sergeant James Donelan and corporal Walter Grose, August to December, 1852, at Goat Fell, relieving each other constantly.
Corporal Walter Grose, December, 1852, to March, 1855, when the use of the theodolite was discontinued.
This is the instrument that was used by General Roy, and subsequently by Captain Kater, in making the trigonometrical observations for determining the difference of longitude between the observatories at Greenwich and Paris.
The greatest distance ever observed by sergeant Donelan was to an object 106 miles from his station. His next two greatest were to points between 104 and 105 miles off. Corporal Jenkins even gained upon his instructor, and observed distances of 106 and 107½ miles. Corporals Forsyth and Stewart were more successful still. One distance obtained was 106 miles, another 108 exactly, and both observed an object upwards of 111 miles away. This achievement records a measurement which exceeds in distance any observation heretofore made on the Ordnance Survey.
The 2-feet Theodolite was used by—
Corporal Andrew Bay, from March, 1843, to May, 1847.
Sergeant James Beaton, from May, 1850, to March, 1855.
Mr. late sergeant James Donelan, from April to September, 1855.
Sergeant James Finch, March, 1856, and still retains it.