An Account of the Bell Rock Light-House / Including the Details of the Erection and Peculiar Structure of That Edifice; to Which Is Prefixed a Historical View of the Institution and Progress of the Northern Light-Houses

by Robert Stevenson

Directions having been given in the month of March for tightening the bracing-chains, and fixing certain ring-bolts, both at the eastern and western landing places of the rock, for the conveniency of the boats, the Light-house Yacht again sailed on the 12th of April, carrying off artificers and all necessaries for the service. After accomplishing this duty she returned to Arbroath on the 14th, and in this state things remained till the commencement of the works in the month of May.

Preparatory state of the Works.

The several implements already alluded to and described, were in a state of great forwardness about the close of the winter, having been prepared in Edinburgh, under the immediate directions of the writer. At Aberdeen, Mr Alexander Gildowie, stone-agent, used every exertion to procure an additional supply of granite from Rubislaw and other quarries. But the severity of the winter was such as to prevent much progress from being made. At Mylnefield Quarry, owing to the liability of that stone to board or split in frosty weather, from its lying in regular strata, by which moisture is more readily absorbed and acted upon in the laminæ, the operations had been entirely suspended for several months.

Use of Granite restricted to the lower courses.

In the month of April, the writer visited the works at Arbroath, which he found still in a much retarded state, for want of a regular supply of granite. Owing to this, it had not as yet been possible to complete even one entire course of the building, although the figure and dimensions of the moulds had been repeatedly altered to accommodate the quarries. It had already become apparent, that the works would unavoidably be stopped, if the whole of the outward casing were to consist of granite. In order, therefore, to avoid a circumstance which might prove hazardous to the whole operations, the Light-house Board resolved to restrict the use of this material to the lower courses of the building.

Use of Sandstone extended.

It having thus been found necessary to lessen the quantity of granite at the Bell Rock, and proportionally to encrease the quantity of sandstone, a new engagement was entered into with the proprietor of Mylnefield, for an additional supply, at the rate of one shilling and sixpence per cubic foot, put free on board. On visiting this quarry in the month of April, the writer had assurance of being largely supplied with stone, if a greater range or variety in the thickness of the courses were allowed. This, however desirable, was altogether impossible, in so far as regarded the lower courses; the thickness of which could only be regulated piecemeal, as the dimensions of the granite stones could be determined.

Mr Skene’s contract to supply Granite.

Every exertion had already been made on the part of Mr Skene of Rubislaw, who had entered into a contract with the Light-house Board to supply granite, at the rate of one shilling and threepence per cubic foot, for the use of the Bell Rock,—having been chiefly induced to enter into this contract, on account of the celebrity of the work;—but after furnishing a few of the lower courses, he found that he could not implement his agreement without incurring considerable loss, and running the risk of retarding the building: he therefore applied to be relieved of his contract. From the commencement of the work, Mr Skene had, with much liberality, stated, that in case the quarries upon his estate should be found defective in producing the necessary size and quantity of materials, his contract should never be allowed to form any bar or stoppage to the Commissioners in applying to others. This had accordingly been acted upon by the Stone-agent; but after making every exertion for the space of about 12 months, he had been able to procure only a few additional blocks of the requisite dimensions, even with the range of all the quarries of Aberdeen, besides those of Rubislaw. The price of suitable blocks had, in the mean time, advanced to three shillings and threepence, and even to five shillings per cubic foot. At the commencement of the Bell Rock works, the quarries of Aberdeen were chiefly worked for paving-stones, and for common house purposes, and were consequently unprovided with implements or tools suitable either for working or transporting stones of large dimensions, for which they had hitherto had no regular demand.