Use cream of tartar in place of tataric acid

How archaic and fun!

I whipped out some Google-fu and found the following for you:

Tincture of Capsicum

You can actually buy this on Amazon: Cayenne Capsicum Tincture 2 Ounces. It's available other places, but I saw prices as high as 2x this. (9 ml ~ 0.3 oz)

Essence of Ginger

This is from a late 19th century Jamaican cookbook (Classic Jamaican Cooking: Traditional Recipes and Herbal Remedies).

• Three ounces of freshly grated ginger
• Two ounces of thinly cut lemon-peel
• Two pints of brandy or proof spirit (white rum)

Just combine and let sit for 10 days, shaking well.

Essence of Lemon

This can also be purchased. You can likely find some lemon extract in your grocery store, if not here is some on Amazon: Flavorganics Organic Lemon Extract, 2-Ounce Glass Bottles (Pack of 3) - note that it's 3 bottles.

Solution of Burnt Sugar

This isn't just typical caramelized sugar, it's burnt sugar. Sugar that has been heated to the dark caramel stage of 370 F to 400 F (188 C to 204 C). The sugar at this point has lost most of it's sweetness, smells burnt, and tastes kind of bitter. It's commonly called caramel color these days. This is what is gives Cola's their dark color. In the small amount of 25ml and in the presence of 2.5 lbs of sugar (wow!) you won't taste it.

My amazon-fu fails here, but have found it available on this site: http://www.spiceplace.com/mccormick_caramel_color.php

It might be simpler to buy this than attempt making your own. Caramel coloring can be a little hazardous to make, it's easy to go too far and burn your sugar, and dumping any quantity of water into 400 F sugar is a sketchy experience. Here is a how-to if you desire though:

http://www.ehow.com/how_5673239_make-caramel-food-coloring.html

Tartaric Acid

This too can be purchased - Tartaric Acid 2 oz. (56 gr.)

Please note that tartaric acid is not the same as cream of tartar. Cream of tartar is an acid-salt in which the tartaric acid is partially neutralized. This site suggests you can use a 2:1 substitution ratio of cream of tartar to tartaric acid. I'm not sure if this will make a difference in your drink because I've never used cream of tartar in such a way or quantity before.

There is also the possibility that a recipe of this age simply used the term tartaric acid to refer to cream of tartar. Who knows?

No beer!? Hmmm.

Well, I can't think of anything that would give you the same flavor, and as a component of the dish it looms quite large...3 day marinade in beer? No way to replace that, and brown ale is distinctive and nutty.

Beer and wine are natural tenderizers, which is what the marinade is for...They're some of the only ones that aren't acidic (buttermilk and yoghurt are others...Obviously not a good choice here) so filling that role without changing the character of the dish is going to be a serious challenge.

Are you looking for a non-alcoholic substitution, or just a non-beer one?

Since tomatoes and apples feature, you might try marinating in cider or tomato juice (depending on which flavor you want to push). You won't want to marinate for anywhere near the same amount of time: those two are acidic enough to digest your meat after 3 days. Might try apple cider and apple cider vinegar mixed. Vinegar marinated beef has an interesting twang to it.