Bon Homme Richard may have been located.
https://www.dailymail.co.uk/science...ck-Bonhomme-Richard-sunk-Yorkshire-coast.html
Shortly after 7 p.m. the Battle of Flamborough Head began. Serapis engaged Bonhomme Richard, and soon afterwards, Alliance fired, from a considerable distance, at Countess. Quickly recognizing that he could not win a battle of big guns, and with the wind dying, Jones made every effort to lock Richard and Serapis together (his famous, albeit possibly apocryphal, quotation "I have not yet begun to fight!" was uttered in reply to a demand to surrender in this phase of the battle), finally succeeding after about an hour, following which his deck guns and his Marine marksmen in the rigging began clearing the British decks. Alliance sailed past and fired a broadside, doing at least as much damage to Richard as to Serapis. Meanwhile, Countess of Scarborough had enticed Pallas downwind of the main battle, beginning a separate engagement. When Alliance approached this contest, about an hour after it had begun, the badly damaged Countess surrendered.

"Paul Jones the Pirate", British caricature
With Bonhomme Richard burning and sinking, it seems that her ensign was shot away; when one of the officers, apparently believing his captain to be dead, shouted a surrender, the British commander asked, seriously this time, if they had struck their colours. Jones later remembered saying something like "I am determined to make you strike", but the words allegedly heard by crew-members and reported in newspapers a few days later were more like: "I may sink, but I'll be damned if I strike". An attempt by the British to board Bonhomme Richard was thwarted, and a grenade caused the explosion of a large quantity of gunpowder on Serapis's lower gun-deck. Alliance returned to the main battle, firing two broadsides. Again, these did at least as much damage to Richard as to Serapis, but the tactic worked to the extent that, unable to move, and with Alliancekeeping well out of the line of his own great guns, Captain Pearson of Serapis accepted that prolonging the battle could achieve nothing, so he surrendered. Most of Bonhomme Richard's crew immediately transferred to other vessels, and after a day and a half of frantic repair efforts, it was decided that the ship could not be saved, so it was allowed to sink, and Jones took command of Serapis for the trip to neutral (but American-sympathizing) Holland.
https://www.dailymail.co.uk/science...ck-Bonhomme-Richard-sunk-Yorkshire-coast.html
Shortly after 7 p.m. the Battle of Flamborough Head began. Serapis engaged Bonhomme Richard, and soon afterwards, Alliance fired, from a considerable distance, at Countess. Quickly recognizing that he could not win a battle of big guns, and with the wind dying, Jones made every effort to lock Richard and Serapis together (his famous, albeit possibly apocryphal, quotation "I have not yet begun to fight!" was uttered in reply to a demand to surrender in this phase of the battle), finally succeeding after about an hour, following which his deck guns and his Marine marksmen in the rigging began clearing the British decks. Alliance sailed past and fired a broadside, doing at least as much damage to Richard as to Serapis. Meanwhile, Countess of Scarborough had enticed Pallas downwind of the main battle, beginning a separate engagement. When Alliance approached this contest, about an hour after it had begun, the badly damaged Countess surrendered.

"Paul Jones the Pirate", British caricature
With Bonhomme Richard burning and sinking, it seems that her ensign was shot away; when one of the officers, apparently believing his captain to be dead, shouted a surrender, the British commander asked, seriously this time, if they had struck their colours. Jones later remembered saying something like "I am determined to make you strike", but the words allegedly heard by crew-members and reported in newspapers a few days later were more like: "I may sink, but I'll be damned if I strike". An attempt by the British to board Bonhomme Richard was thwarted, and a grenade caused the explosion of a large quantity of gunpowder on Serapis's lower gun-deck. Alliance returned to the main battle, firing two broadsides. Again, these did at least as much damage to Richard as to Serapis, but the tactic worked to the extent that, unable to move, and with Alliancekeeping well out of the line of his own great guns, Captain Pearson of Serapis accepted that prolonging the battle could achieve nothing, so he surrendered. Most of Bonhomme Richard's crew immediately transferred to other vessels, and after a day and a half of frantic repair efforts, it was decided that the ship could not be saved, so it was allowed to sink, and Jones took command of Serapis for the trip to neutral (but American-sympathizing) Holland.