Wow, that went more quickly than I thought it would, well done to Cosmo and to Longpockets for filling in the gap around Sir John Stevens Henslow's father.
I'll flesh the story out with a bit more detail. The best way to explain this is to start at the end and work back. The theory of evolution was first publicly proposed in the book "On the Origin of Species", published in 1858 and written by Charles Darwin. The seed of the idea was first planted in Darwins mind during a five year long voyage of discovery in a small Royal Navy warship, specially converted for the voyage, HMS Beagle. Darwin was a Botanist and Geologist by trade and he had studied Botany and Geology at St John's College in Cambridge University, starting in 1828. His tutor, friend and mentor had indeed been Sir John Stevens Henslow.
Sir John Stevens Henslow had been born, raised and educated in the City of Rochester, where his father, John Prentice Henslow was a prominent solicitor.
John Prentice Henslow had been the son of Sir John Henslow, Surveyor of the Navy. Sir John Henslow was born in 1730 in the Woolwich Royal Dockyard, where is father, also John, had been Master House Carpenter at the time of his birth. In 1745, at the age of 14, the young John Henslow had travelled to the Royal Dockyard at Plymouth, to be indentured as an apprentice Draughtsman to Thomas Slade, at the time, Master Shipwright in the Royal Dockyard. John Henslow was eventually promoted to the position of Surveyor or Chief Designer at the Navy Board in 1784. During his long career as Surveyor, he designed some of the Royal Navy's most successful vessels and was knighted for his work by King George III in 1793. He retired in 1806, and lived out his retirement in Sittingbourne where he died in 1815. After his death, he was buried at St Mary Magdalene's Church in his home town of Woolwich.
Thomas Slade was eventually promoted to Surveyor of the Navy and also produced the designs for some of the Royal Navy's most successful vessels, including HMS Victory.
So well done everybody. If anyone fancies setting a similar puzzle, please do, but post it as a separate thread.