Very sad news, indeed, Mark.
I watched a video of Liam the other day and was enchanted by his accent. As I remarked at the time, I would have listened to him talking irrespective of what he was saying, so I had the added benefit of being enthralled and motivated by the content of the video, he really did turn some beautiful pieces and he came across as being the gentle man who you describe.
I recall your trip to Ireland and the collaborative works that you did there (especially the wall), that must have been one heck of an experience to be working alongside people like Liam.
Les