Hi Luke @Luke,
I posted this score of Precious Lord, Take My Hand for @Poppo back in March. As you can see, it is in the key of G, but, of course, the tabs can be played on any blues harp, where the key of the song then changes according to the harp used.
Your link is terrific for this great gospel melody where Randy Travis and Jelly Roll Johnson both play with so much emotion! Thank you, Luke.
Regards,
– Slim 