Reddit mentions of THE Expert Sword-Man's Companion: Or the True Art of SELF-DEFENCE. WITH An ACCOUNT of the Authors LIFE, and his Transactions during the Wars with France.: To which is Annexed, The ART of GUNNERIE

Well theres at least a few Scottish fencing treatises such as

Donald McBane (1728) https://www.amazon.com/Expert-Sword-Mans-Companion-SELF-DEFENCE-Transactions/dp/1542618320

Archibald MacGregor
Lecture on the Art of Defense (1791)

(Probaly) George Sinclair
Anti-Pugilism (1790)

William Hope

Plus as you said quite a few Englishmen claiming to cover a supposed Scottish style or Scottish weapon.

Irish backsword fencing treatises:

Andrew Lonnergan
The Fencer's Guide (1771)



I pretty much agree with the Cateran Societies theory that the three kingdoms used a very similar common system (regimental & Stage-Gladiator).

This article (from almost a decade ago) and what can be found in the "Lessons of the Broadsword Masters" manual from Christopher Scott Thompson go over it in more detail.

http://jwma.ejmas.com/articles/2011/jwmaart_thompson_0411_2.htm


I just wanted to know what was out there for backsword material with an Irish twist but it seems like Ben Miller's book "Irish Swordsmanship" and Andrew Lonnergan's treatise (mostly covering smallsword) are about it for readily available sources at the moment. Thanks for replying to my question, thats pretty much what i was thinking too.

Smallsword is taught at Martinez Academy in NYC, and at several affiliated schools on the West Coast. If your location makes that sort of training impossible, their smallsword DVDs are also recommended:

http://www.martinez-destreza.com/products/l’école-française

In terms of books...while I don't advocate learning martial arts from books, if you want to do some historical reading, there are a number of 18th century smallsword texts you could look at, with varying approaches. Angelo's is considered one of the great classics of the French school:

https://www.amazon.com/gp/aw/d/1473882974/

And if you're interested in something unorthodox and a bit different (but entertaining), try McBane:

https://www.amazon.com/gp/aw/d/1542618320/

In terms of free online material, Columbia Classical Fencing tends to post a lot of stuff:

https://columbiaclassicalfencing.com

And the Linacre School of Defence has transcribed William Hope's works on the smallsword:

https://linacreschoolofdefence.org/Library/Hope/index.html