[Harp-L] Help Me Transcription/Key Question

[Bill Hines <billhines4@xxxxxxxxx>]

I have the David McKelvy "Blues Harmonica Collection" book of 
transcriptions for many common blues harp songs. I see for Help Me he 
says to use the Bb harp in 2nd position (cross harp) so that should be 
key of F. But the music notation shows a G clef with four flats so that 
should indicate the song is in Ab. This sounds Ok with the stated harp 
for the SBWII studio cut (a la green onions) but it's confusing to me. 
The song begins and ends on 3 draw which is A on a Bb harp. What gives?

Bill Hines