Grandma and Grandpa Pratt's Buckwheat Pancakes

Better than a picture of the food - this is a copy of Grandma Pratt's handwritten recipe. On Grandpa Pratt's Suzy's Zoo Recipe Cards. I had them write this down for me when I was very young, laminated it with contact paper, and somehow it has survived many years. If I remember right, at least one of the two versions (it has a medium and a large) doesn't work well, so I welcome comments to tweak it... Asking them to write it down was a major task since I don't think they had ever measured ingredients. Alton Brown would tell us to convert it to weights.

You'll notice some odd incongruencies. Keep these things in mind:

Water and Egg whites are in the directions but not in the ingredients.

I assume that the 'large recipe' should be brown sugar just like the 'medium recipe'.

Medium:

Dry Ingredients:

2 c. Flour
1/2 Tsp. Soda
1 Tbsp Brown Sugar
Wet Ingredients:
1 Egg Yolk
1-1/2 c. Buttermilk

1 Tbsp. Oil

Water as needed

Mix together & then add whipped whites.

Large:

Dry Ingredients:

4 c. Flour
3/4 tsp. Soda
2 Tbsp sugar
Wet Ingredients:
2 Egg Yolks
2 C. Buttermilk
2 Tbsp Oil

Later on, after I was married, I got more detailed instructions over the phone one day; here they are:

1 Heaped Vienna Sausage Can (5-1/2 ozs +) of Flour
1 Heaped Tablespoon of Brown Sugar
1/4 Tsp. Soda (Not powder! Powder is Soda plus an acid, the buttermilk has acid in it)
Tiny bit of oil if the griddle is well tempered. A little more than a teaspoon if it's not a well-tempered griddle
1 egg, separated, even if the recipe is doubled
Put the yolk in the Buttermilk (1 cup?)
Beat the white until stiff
Add the beaten white after the rest of the fluid has been added to dry ingredients
After the first side bubbles, the second side should cook 1 or 1-1/2 minutes. Time it.