Only point to bring up is that Colonel Monro was a real person, but he wasn’t killed, (tho he did die shortly after) but yes because of that there wasn’t any heart cutting.

I hope his daughters lived to a ripe old age, surrounded by their grandchildren.

The historical 35th Regiment claimed revenge for Fort William Henry when the Royal Roussillon Regiment, who apparently were present at the surrender, formed part of Montcalm's force on the Plains of Abraham at Quebec on 13th September 1759.

According to tradition the 35th were placed in the same portion of the field as the Royal Roussillon. When the French line crumbled, the Royal Roussillon are said to have made a brief stand some way back towards the walls of the city, before being swept along in the rout, and it may be, although there appears to be no contemporary evidence, that at that moment the 35th confronted the enemy regiment that had presided over their humbling at the fall of Fort William Henry in 1757 and stood idly by when Montcalm's Indian allies attacked.

In the C19th, now titled the 35th Royal Sussex, the regiment later embraced the popular trope that at Quebec they had picked up white plumes from the hats of fallen enemy soldiers and stuck them in their own. That tradition that led to the 'Roussillon Plume' featuring in the badge of the Royal Sussex Regiment in 1881