The lute tuning was probably in G, equivalent to using a capo on the 3rd fret.
It is sometimes played with the three bottom strings tuned one octave lower.
The guitar sheet fingering tries to reflect the original lute music. Some of
the stretches and held notes show what the composer intended, but are not
easy to play on a guitar. In these cases the tab has been changed to make it
playable, for example measure 26, where the sheet has the first note (B) held
almost to the end of the measure.