Stephens was born at 71 York Road,
Lambeth, London on 2 February 1841, the son of
Dr Henry Stephens and his second wife Anne, of
Redbourn, Hertfordshire. Dr Henry Stephens (1796–1864) was the inventor in 1832 of an indelible "blue-black writing fluid" which was to become famous as Stephens' Ink and to form the foundation of a successful worldwide company for over 150 years. The family moved to
Finchley, north London, in 1844 where Dr Stephens bought and renovated a large residence named Grove House, in Ballards Lane. The outbuildings of Grove House were used by the inventor as a laboratory for research and manufacture of ink and wood stains; thus Henry Charles grew up among his father's work and learnt the business from a young age. After an early education in France, the boy returned to England to attend
University College School. He left school at the age of 16 but continued with chemistry and science studies (at the School of Mines, Kensington - now part of
Imperial College London) while also involved in the family business. At the age of 23, in 1864, he took over the management of the company upon the sudden death of his father, who collapsed and died at
Farringdon station. The year before (1863), he had married Margaret Agnes Mackereth, the daughter of an old medical-student friend of his
father. They lived for a while in Grove House with Stephens' widowed mother, then in 1874 purchased nearby
Avenue House in East End Road and ten acres of adjacent land, on a site formerly known as Temple Croft Field. Stephens enlarged and improved the house and in the 1870s sought advice about having the grounds developed, and employed landscape gardener
Robert Marnock (1800–1889). Marnock's plans included lawns, ponds, mounds, paths and steps, and a walled kitchen garden and park-keeper's dwelling known as The Bothy (1882). Stephens added a water tower with adjacent building, a lodge, coach house and stable block and arranged for a number of rare trees to be planted throughout the grounds. In 1872 the ink factory and offices were moved from
Aldersgate Street to 275 Holloway Road,
Holloway; in 1892 the factory moved again to nearby Gillespie Road, close to Arsenal station. In January 1888 Stephens was admitted to the Freedom and Livery of the
Worshipful Company of Spectacle Makers. The Stephens' Ink company was innovative and profitable and Henry Stephens was a very wealthy man. In February 1900 his eldest son, Henry O'Reilly Stephens, sought to enforce an agreement made with his father in June 1893 whereby he would be paid £25,000 or interest of 6% per annum of that sum for the rest of his life in the event of him leaving the company. The case was settled out of court on unknown terms. Stephens was popular in Finchley as a businessman, lecturer and philanthropist and was known as "Inky" Stephens, the "uncrowned king of Finchley", as a result. Aside from the family business and politics, he was a chemist, a local benefactor and philanthropist, and had an interest in agriculture and water management. ==Political life==