Rev. Sir, I received, about a month ago, the favour of your letter, and return you many thanks for the Greenwich observations, which you were so obliging to send me. I wait, with impatience, the publication of your journey into Scotland, which must be very curious and interesting. I beg of you, Sir, to present by respects to the Royal Society, with the inclosed astronomical observations, which I have contracted as much as I well could, consistently with a view of affording means to verify them, or rectify any mistake which, by inadvertency, may have crept in. I shall only add a short account of the instruments I used, and the elements I employed in the calculations, that a proper judgement may be formed, how far these observations may be depended upon.