I think William Caslon IV's "Two Line Egyptian" is generally considered the first sans-serif... it's certainly English, and certainly 19th C. Uppercase only, AFAIK. I don't know where you might find an implementation, though (if you need one, that is).

Thank you very much! An implementation of it (or at least, a reinterpretation of it) may be required at a later stage. But currently, I'm gathering as much as I can. I've scoured the net and have only found a fair few.

The correct name is "two line English Egyption", BTW. There's a sample halfway down this page.

Here is an implementation. This is a link to a pdf. I was unable to navigate to anywhere else on Cavedoni's website.
- Herb