Conal, why do we have to do a Google search for you? It took me two seconds to find that his music has been published by Tecla in facsimile. Those original publications don't always show the low bass notes, as the publisher wanted to sell copies to as many people as possible, and that meant six-string players, but it's an easy task to just drop the note an octave when you think it suitable. Great music for your new guitar when you get it!
Lovely video. I love her smile at the end
And she is right about Segovia's guitar being originally an eleven-string.