An ancestor of the current Darkstones of Porthaven, and thus an ancestor of a line long of pirates, Guillaume d’Arquestone began his pirate career as a man with a grudge.
Originally a knight from the Duchy of Chevaliers, d’Arquestone was disgraced and exiled for reasons that remain vague and poorly-understood by historians. The theory supported by most historians holds that he was the victim of a conspiracy undertaken by several politic rivals.
Whatever the reason, d’Arquestone was driven from Chevaliers and turned renegade, raising a pirate crew and amassing several ships to take his revenge on Chevaliers by harassing its trade ships and leading several daring direct attacks on Chevaliers’ port cities.
Ironically, it was these very attacks that led to d’Arquestone’s rehabilitation with the leaders of Chevaliers.
The ascension of a new Duke led to many of the nobles believed to be responsible for d’Arquestone’s exile in the first place losing their influence in Chevaleresque politics.
The new Duke of Chevaliers was said to prefer having an audacious pirate for a friend rather than an enemy, and offered to rescind d’Arquesone’s exile and restore his lost title and estates in return for pledging his ships to the exclusive service of the Chevaleresque navy.
D’Arquestone agreed to these terms and subsequently became a great hero of many of Chevaliers’ naval battles.
However, he never actually returned to Chevaliers, believing his homeland held too many painful memories of his disgrace and exile, as well as too much potential to find himself further embroiled in political chicanery.
Thus, he bequeathed his Chevaleresque estates to his younger sister and ultimately settled in Porthaven.
It is widely believed, albeit with little definitive historical evidence, that d’Arquestone married a mermaid. Indeed, more so than any episode in a pirate career notable in its own right, d’Arquestone remains best known as the man who married a mermaid.
While it is established in the historical record that d’Arquestone married and had children, his wife’s identity is not entirely clear, leading to much conjecture.
Among few attested facts about d’Arquestone’s wife is that she was a remarkably beautiful woman with a fondness for the sea. This is taken by some as proof of her mermaid identity, though skeptics note that such traits are by no means exclusive to mermaids.