Basically, the shape and profile of the knife was very similar to the one made by Patrick Hand which I will link an image to (hope you don't mind Patrick)...
It was smallish (about a 4 to 5 inch blade), and very much had the air of an eating utensil to it (that might be because it was displayed with a fork and a spoon). The handle was a lot more ornate than Patrick's, I think it was made of ivory, or perhaps some other white opalescant material (mother of pearl?).
Sorry I can't be more specific than that. Since I know that is an item that you are particulariuly interested in, I'll make sure I take more careful notice of it next time I go to see the exhibit.
Thanks so much, Michael. If I could find out more about the knife, I could probably replicate it, as I am also a knife maker. The particular style of Patrick's knives are a very common style of knife for the 1700's, you find that style to a large extent in North America used as trade knives. They were utility knives; used for everything from skinning game, whittling, eating and kitchen chores, or even taking scalps.