If you mean the Banting diet 1864, it's freely available online.
In the first edition his basic diet is :
14 oz of meat poultry, game or fish (except salmon and pork), 3-4 slices of dried toast or rusk , small amounts of fruit, 2-3 glasses of claret, sherry or madeira at dinner, another glass or two of claret with supper and a nightcap of another couple of glasses of wine or a tumbler of grog made with whisky, gin or brandy but no sugar.
no butter, milk, sugar, beer, and potatoes,
In a latter appendix he prohibits other starchy veg, says green veg are ok as are non hard boiled eggs and rice.
The Victorian gentleman's low(ish) carb, lowish calorie, high protein and high alcohol diet. It works out as just over 2000 calories but 44% of the calories are from alcohol
https://archive.org/details/letteroncorpulen00bant