In reply to elliptic:
Thanks guys, so looks like he was a publisher of prints and postcards rather than the original photographer.
Given that I guess it's quite likely it was actually taken by one of the Tairraz father/son. I'll keep looking and see if I can pin it down any further.
When I get a moment I might put it up here in the historical section, it's quite an interesting document of the valley before the Midi cable car etc.