Comment by ndlxs on Sherlockian Abduction Master List · 2024-07-01T13:53:18.870Z · LW · GW

More on stringed instrument players:
Callouses on left hand(fretting hand) fingertips(except the thumb).  If left handed person, they may be on the right hand. 
Fingernails cut short on fretting hand; for guitar players strumming/picking hand(opposite of fretting hand) fingernails may be longer for those who play fingerstyle guitar style.