Indubitable Brown ("Doobie" to his public school form mates, Dooobie doo, to his enemies) was,in 1843, the sole remaining heir to the Brown fortune . Though the names of several of his ancestors are more familiar (Charles "Charlie" Brown, the famous footballer and "Capability" Brown, Queen Victoria's head gardener are well known throughout the empire, as are "Dirk" Brown, the infamous sky pirate, and Sepia Brown, the daguerreotype portrait artist) it was Veritably "Very" Brown, who's invention of the hand held parachute flare launcher, the "Very Pistol" that made the families first fortune, through it's subsequent adoption by the British merchant marine and navy, as standard issue in all lifeboats and airships.
By the time Doobie reached his majority, his line had been sadly winnowed by misfortune; death in battle, laboratory incidents, and old age, leaving him the sole living Brown. Not one to rest on his laurels, or dally long on his fundament, Doobie, in seeking ways to further increase his worth, purchased Babbage's designs for mechanical calculating engines, supplied that brilliant man with a shop and assistants, and funded his further research. The end result was that Doobie owned the monopoly on the manufacture of the steam powered calculator, with all the advantages entailing from that position.
At about this time, Doobie met Annalevesia, a winsome young lady of good family ( but poor prospects) who came to his attention when she applied for a position in his employ. Doobie was smitten, and showered her with gifts, the most expensive of which was a "backtop" version of the Babbage calculating engine.