Watch the Loving You: Ex. 2a online guitar lesson by Andy Aledort from Kings of Rock & Roll Vol. 7: Jimmy Page

One of the greatest solos Jimmy Page every recorded can be heard on the Led Zeppelin III track, "Since I've Been Loving You," upon which the next two solo excerpts are based. This example is a slow minor blues in the key of C minor, and the riffs are based on a combination of C minor pentatonic (C Eb F G Bb), the C blues scale (C Eb F Gb G Bb) and the C Aeolian mode (C D Eb F G Ab Bb).
This excerpt encompasses the first four bars of the slow minor blues form, and is filled with fast, "crammed' phrases that squeeze many notes into each beat; many of the phrases are articulated with hammer-ons and pull-offs, so study the transcription carefully.