1/4 Pound beef suet, finely chopped
1 Calf heart, cut in small pieces
1 Calf liver, cut in small pieces
2 Calf kidneys, cut in small pieces
Marrow gut, chopped
1 Pound sweetbreads, simmered in salt water and membrane removed
1/2 Pound brain, soaked in salt water, deveined and cubed
1 Large onion, chopped
1 Can of tomatoes
2 Cups beef broth
Hot peppers, as desired

In a large Dutch oven render fat from beef suet. 
Add heart, liver, kidneys and marrow gut.(see note below for description) 
Cook over high heat until lightly browned. Add prepared sweetbreads and brain and remaining ingredients. 
Cover and cook 1 to 2 hours or until tender and thickened. Season with salt to taste.

Ruff Justice
 

Note from Delmonico; My pal Ruff has not defined marrow gut for you fine folks and I know someone is ready to make this and lacks the right part and don't know what it is and the grocer don't either. SOB or SOG stew (either is correct, one is more polite) is tradionally made out of a unweaned calf, the marrow gut is the tube that connects the first and second stomach of the calf. It is called a marrow gut because the undigested milk looks somewhat like marrow. Sweetbreads are the thymus gland and the pancreas of the animal. The thymus gland is in the base of the neck and is part of the lymph system. Ruff you gave us a recipe for gut soup!  This was considered the ultimate in Cowboy Cusine. (Kill the fattened calf?) Charles Goodnight was planning to make one for Christmas Dinner, but he died a few days before.