So my estimates of the amount of marrow in my marrow bones was incorrect. I was told by the vendor that they were about 1/3 marrow, which might be correct by volume. By weight, the number is much different. I got my scale recently, though, so now my food can be weighed.
I ate:
3 oz. of marrow which was all of the marrow in 17 oz. of beef leg marrow bones
16 oz. of 78/22 high fat ground beef
3 oz. of beef heart
According to NutritionData, this is 1950 calories, broken down as 80% fat and 20% protein. It includes 93g of protein and 172g of fat, with 0.1g of carbohydrates. It is only 88% of the calculated necessary calories for my body, so I may need to increase my food intake. I do notice that hunger begins to creep in a few hours before my meal. I just calculated that 3 raw eggs brings me up to 98% of caloric requirements, so I am going to eat 3 eggs now and see if hunger is kept at bay a little longer tomorrow.
EDIT: I am using the NutritionData information for suet because there is no entry for marrow. I may make a customized entry for marrow, if I can get good data to use. Fitday has elk marrow, which might work for this. Ounce per ounce, raw marrow has a little more fat and calories, and more protein than suet according to Fitday.
EDIT: With the eggs added, I am at:
2165 calories (98% of DV)
78% fat, 22% protein cals
112g protein
187g fat
1.3g carbohydrate