I am fascinated by proto-history and the subsequent spread of farming across Eurasia. I guess pipes and bags have travelled back and forth many times.

Proto, early and even 16C & 17C history may not reveal how somebody sat down and made a set of Uillean pipes for the first time. But the history of the 19C might.

The craftspeople who made the first pipes clearly based them on other pipes. Which ones and when?

I am sorry if this was actually answered in the second post.