from - Martin Roulston 

St. Vitus Dance
Black Sabbath - Volume 4 (1972)
Tune down 1 1/2 steps


Riff 1 - Need help here, something like - 
  C       I use 4th finger while holding C chord
e|--------|-------|----------------|
B|5---------------|------------5---|
G|5-------7-5---5-|5-----------5---|
D|5-----------7---|------------5---|
A|3---------------|--3-6p5p3---3---|
E|----------------|----------------|
  C        I use 4th finger while holding C chord 
e|---------|------|----------------|
B|5--------6-5-5--|5-----------5---|
G|5------5----7---|5-----------5---|
D|5*--------------|5-----------5---|
A|3*--------------|3---6p5p3---3---|
E|----------------|----------------|
   * - let ring
Riff 2


  C5               Bb5   Eb5     F5
e|----------------|----------------|
B|----------------|----------------|
G|----------------|----------------|
D|5-----5-5-----5-|1-----8-87/8-10|
A|3-----3-3-----3-|3-----6-65/6-8-|
E|----------------|----------------| (X2 per verse line )


Riff 3
  A                G       E   G
e|----------------|----------------|
B|----------------|----------------|
G|----------------|----------------|
D|7-----7-7-----7-|5-----5-2---5---|
A|7-----7-7-----7-|5-----5-2---5---|
E|5-----5-5-----5-|3-----3-0---3---|