Hi David. Welcome to the forum.
Your post has now been moved to the appropriate section.
The numbers, 1 - 4, refer to the fingers of the left hand, with 1 being the index, 2 the middle, 3 the ring, and 4 the little finger. When right hand fingerings are annotated we use pima, with p being the thumb (pulgar), i the index, m the middle, and a the ring (annular).
2010 Stephen Eden spruce/cocobolo classical guitar
2012 Stephen Eden cedar/IRW classical guitar