Humphrey Sibthorpe was born in 1711 at Canwick near Lincoln. He went to Oxford, where he gained his degree in 1737, and ten years later, in 1747, became the Sherardian Professor of Botany at Oxford. The great Swedish botanist, Carl Linnaeus, named a plant after him, Sibthorpia Europa, commonly known as the Cornish Moneywort, in recognition of his botanical expertise. However, he was said to have taught only one course, repeated each year, in his 37 years as a professor, and that, of no great merit. He married twice, the second time to Elizabeth Gibbs, in 1757, who owned property in Instow. They had a son, John, born at Oxford in 1758, who eventually succeeded Humphrey as Professor of Botany, in 1784. In fact, Humphrey voluntarily stood down to make way for his son, and retired to the Instow estates that his son had recently inherited. It was said of Humphrey, rather cruelly, that he did much more for science by raising his son, than ‘by any writings or investigations of his own’.
John Sibthorpe’s main claim to fame was that he produced a monumental book on the plants of Greece, for which he collected more than 3000 specimens; and for employing an Austrian botanical illustrator, Ferdinand Bauer(q.v.) then as now considered to be amongst the world’s greatest such artists. The work was entitled the ‘Flora Graeca’, which ran to twenty volumes, required 3 years of field research, and a further 2 years to complete, containing nearly 1000 hand-coloured illustrations by Bauer. Because of its size, only 25 copies were initially printed, and was very expensive to buy. A second edition of 40 copies was later produced, but that was all. One can hardly describe it as a commercial success. However, such is the quality of the illustrations that it is considered to be a masterpiece of its kind, and would now cost more than £20,000 to purchase.
Unfortunately, John died very young from consumption, brought on by a cold, unmarried, and pre-deceasing his father, who had, in the meantime, spent his retirement managing and developing the estates his son had inherited, seeing the potential for Instow as a holiday resort, and had some houses built along the front.
Humphrey himself died the following year, and the estate passed on to the son of his first wife, Humphrey Waldo Sibthorp. He sold off some of the land before returning to Lincolnshire to live, where he died in 1815. His descendants proceeded to sell off the rest of the land, encouraged by the steep rise in the value of land during the Napoleonic Wars. The Manor of Instow was eventually bought by Colonel Augustus Saltrens Willett, who fought at the Battle of Waterloo, and who had inherited the neighbouring Tapely Estate from his great-uncle, John Clevland, on the condition that he changed his name to Clevland, which he did, but with some reluctance. He bought the Sibthorpe estate for £23,000, enough money to allow the Lincolnshire Sibthorpes to take seats in Parliament for many years to come.
John Sibthorpe couldn’t get on with the damp Devonshire air, so on returning from his European travels, retired to Bath, where ironically he died from consumption, as mentioned earlier.
Humphrey Sibthorpe’s monument is in Instow Church, where it is decorated by garlands of Sibthorpia.