This is not really a hornpipe but a highland which is not a category available when submitting. Altan (Altan’s finest) play it more like a hornpipe than a Highland anyway and the tempo is slower than a reel but a little faster than a hornpipe. Another thing they do is to play a double stop by hitting a B along with every middle G played.
Con Cassidy’s Highland, X:2
As heard on Altan’s self-titled album
Re: Con Cassidy’s Highland, X:2
@Gabriele, your setting here is not the tune in question but rather another one Cassidy played which he called "The Lazy Dog". It’s in the database here: https://thesession.org/tunes/3981.