Charles Grant Blairfindie Allen was born on February 24th, 1848 at Alwington, near Kingston, Canada West (now part of Ontario). He was the second son of the Rev. Joseph Antisell Allen, a Protestant minister from Dublin, Ireland and Catharine Ann Grant, the daughter of the fifth Baron of Longueuil.

Grant was educated at home until he was thirteen at which time the family moved, initially to the United States, then France and finally settling in the United Kingdom.

Whilst growing up the family background was obviously religious but Grant developed his own views on life and the world and turned to agnosticism and socialism.

He was educated at King Edward's School in Birmingham and Merton College in Oxford. After graduating, Grant studied in France and also taught at Brighton College. By 1870, still only in his mid-twenties, he became a professor at Queen's College, a black college in Jamaica.

Whilst in Jamaica Grant met and married his first wife Ellen Jerrard in 1873 and they produced a son five years later; Jerrard Grant Allen, who grew up to become a theatrical agent/manager.

Interestingly Grant wrote novels under female pseudonyms. One of these was the short novel The Type-writer Girl, which he wrote under the name Olive Pratt Rayner.

Another work, The Evolution of the Idea of God 1897, propounding a theory of religion on heterodox lines, has the disadvantage of endeavoring to explain everything by one theory. This "ghost theory" was often seen as a derivative of Herbert Spencer's theory. However, at the time, it was well known and brief references to it can be found in a review by Marcel Mauss, Durkheim's nephew, in the articles of William James and in the works of Sigmund Freud. The young G. K. Chesterton wrote on what he considered the flawed premise of the idea, arguing that the idea of God preceded human mythologies, rather than developing from them. Chesterton said of Grant Allen's book on the evolution of the idea of God "it would be much more interesting if God wrote a book on the evolution of the idea of Grant Allen".

From this and other instances, it can be seen that his work was in debate and whether agreed with or not could always ensure a lively discussion.

Grant also helped to pioneer science fiction, with the 1895 novel The British Barbarians. This book, was published at about the same time as H. G. Wells was to publish The Time Machine. The plots are quite different but both describe time travel. A few years later his short story The Thames Valley Catastrophe (published 1901 in The Strand magazine) describes the destruction of London by a massive volcanic eruption. Whilst the premise now may seem outlandish, at the time genuine panic and concern set in as, like his contemporary, Jules Verne, much of great science fiction writing is rooted in a plausibility that is set out very convincingly.

In detective fiction too his works include female detectives, very much an innovation in the young genre and his gentleman rogue, Colonel Clay, is seen as a forerunner to other, perhaps more famous characters, by other later writers.

In 1881 he had settled at Dorking, where he took great delight in botanical walks in the woods and sandy heaths. He never enjoyed particularly good health and so almost every winter he would depart for milder climes, to winter in the south of Europe, usually at Antibes, though occasionally as far as Algiers and Egypt.

In 1892 he bought land almost on the summit of Hind Head, and built himself a charming cottage which he called the Croft. Here he found that it was possible to endure the vagaries of the English winter and in landscape more beautiful and wilder than at Dorking and that his long scientific training could better appreciate.

His growing re-discovery and interest in art in the later part of his life allowed him to blend together literature, art and history in a series of guide books on Paris, Florence, Venice, and the cities of Belgium.

On October 25th 1899 Grant Allen died at his home in Hindhead, Haslemere, Surrey, England. He died just before finishing Hilda Wade. The novel's final episode, which he dictated to his friend, doctor and neighbour Sir Arthur Conan Doyle from his bed appeared under the appropriate title, The Episode of the Dead Man Who Spoke in the Strand Magazine in 1900.

Grant Allen is rarely heard of today, although an occasional short story can be heard on the radio or reprinted among magazine enthusiasts but in his time he did much to entertain the masses and push several genres along a richer journey they are still proceeding on today.