Longhills in its present form was built by the Rev Peregrine Curtois, "erected in 1838, on the site of an ancient house at the head of a woody vale." (White's directory, 1842). The earliest reference that I have been able to find to him living at Longhills in is White's Directory of 1826. I know nothing about its occupants prior to that.
TO STONE MASONS. WANTED, eight or ten good Rough Stone Masons, who will meet with work by applying to the Clerk of the Works, Longhills, near Lincoln. Longhills Oct. 3d, 1836. Stamford Mercury, Friday 07 October 1836
A fine sight meets the eyes of travellers journeying to our ancient city by way of Branston. About half mile ere they enter that village, sumptuous-looking new hall erects its crest amidst the plantations to the right; while an odd grotesque-looking fabric, intended as a lodge, stares at you by the road side. Perhaps there might be a worse way of laying out money, derived in the first instance from making strait-waistcoats for a royal lunatic: but then if clerical grandees feel disposed to gratify the public by erecting such monuments of taste as the hall and lodge in question, it is not exactly to our minds that are to be taxed for this singular gratification by giving votes to the Tories. The owner of the superb new hall, and handsome lodge, seems, however, to have struck out this new idea with strength and vivacity quite interesting: an outvoter was told by him during the recent city election that he must give a vote to Mr. Ellis, for Lord Ripon was about to rebuild tho hall at Nocton, at a cost of 30,000/. How many votes did the Rev. Gent. gain for the Tories by building his new hall, and what did it cost? for if this be known, we may form some relative idea of the number of votes to be purchased by the resuscitated splendours of Nocton. Stamford Mercury, Friday 11 August 1837
The reference to strait-waistcoats for a royal lunatic comes from the fact that Rev Curtois inherited his money from Dr Willis:
He has left property to the amount of about 300,000l. By his will, the estates and establishments at Greatford and Shillingthorpe are bequeathed to his nephew, Dr. Francis Willis; the sum of 20,000l. to each of his nieces, sisters of the Rev. P. Curtois; 10,000l. to Mr. Bowman, who for more than 50 years was the chief assistant in his estabishment; and the Rev. P. Curtois, Rector of Branston, is the residuary legatee, and will, it is said, in that character, acquire 100,000l. Dr Willis was never married. Annual biography and obituary: 1836, London, 1836