The distribution of the party gave ample employment to every man, and the division of labour was adapted to the attainments of the men and the necessities of the duty. Corporal William Jenkins assisted the sergeant at the bars and microscopes. The latter compared the microscopes with the standard on Sundays; and frequently, after a severe day’s work, the same process was necessarily gone through, and other adjustments of the instruments effected. Corporal Edward Harkin constantly attended to the aligning instrument, whilst one man assisted him in preparing the stations, &c.; two privates levelled the triangles for the feet of the supporting stools for the bars; two attended to the adjustment of the stools on the triangles, levelled the camels on them, and moved forward the microscopes, &c.; two carried forward the bars and point-carriers, and levelled the former and fixed the latter; one registered the bars and microscopes, and otherwise aided in moving them forward and adjusting them; one, a carpenter, made the pickets, and repaired the mallets, tents, &c.; four attended to the shifting and placement of the tents; one was sentry over the bars at the dinner hour and during the night, to prevent any disturbance in the apparatus; and two attended to the domestic and miscellaneous duties of the huts. The camp occupied three different positions on the line. It was thus moved twice forward. On each occasion, for a few days, no progress was made in the remeasurement, and sergeant Steel with two privates, filled up the interval in comparing the bars and microscopes with the standards. In the meantime, the remainder of the detachment fitted up the portable huts in the position selected for them. Great nicety and precision were required in the placement of the bars; and so rigidly did the sergeant enforce the strictest exactness in their alignment and contiguity, that he would not order the “move forward” until he satisfied himself that the possibility of an error in the operation was not likely to exceed the 10,000th part of an inch. In this way the work was continued till the 16th October, 1848, when the 3,484th bar shot over the old Sarum terminus of the line. This was followed by a spontaneous cheer, hearty and sustained, from the assembled party who thus commemorated the successful accomplishment of the operation. By previous computations from the Lough Foyle base, the perfect accuracy of the remeasurement was proved; for, not only did the predetermined bar reach the gun, but the very inch of it entered the muzzle.