Written by Vince Guaraldi

Here's a way to play it on guitar 
(I think it souns best on a classical guitar):

Part I:

  C           F           C           F
|-12--8-8---------------|-12--8-8---------------|
|----------------10--10-|----------------10--10-|
|-------------12-----10-|-------------12-----10-|
|-----------------------|-----------------------|
|-------------10-----8--|-------------10-----8--|
|-8---------------------|-8---------------------|

Part II:

  Dm               C                A#      Dm C
|-5-------------0--3-------------1----1-----1--3-|
|----6-6--------------5-5-----------3---3--------|
|----------------------------------------------0-|
|-------------------------------------------0----|
|-5----------4-----3----------2-----1----------3-|
|------------------------------------------------|

Part I:

  C           F           C           F
|-12--8-8---------------|-12--8-8---------------|
|----------------10--10-|----------------10--10-|
|-------------12-----10-|-------------12-----10-|
|-----------------------|-----------------------|
|-------------10-----8--|-------------10-----8--|
|-8---------------------|-8---------------------|

Part II:

  Dm               C                A#      Dm C
|-5-------------0--3-------------1----1-----1--3-|
|----6-6--------------5-5-----------3---3--------|
|----------------------------------------------0-|
|-------------------------------------------0----|
|-5----------4-----3----------2-----1----------3-|
|------------------------------------------------|

Part III:

  Fm         C#maj7   Fm         C#maj7
|-8-------------8-8-|-8-------------9-8-|
|----9-9------------|----9-9------------|
|-----------------6-|-----------------6-|
|------------10---6-|------------10---6-|
|-------------------|-------------------|
|-8-----------------|-8-----------------|

  F               FaddD         Gm       Am     G
|-8--------------8--------------6--3-3-3---5--5-3-|
|----10-10----------10-10-------------------------|
|-10-------------10-------------------------------|
|---------------------------10--------------------|
|--------------0----------------------------------|
|-8--------------10---------8---3--------5------3-|

Part I:

 C           F           C           F
|-12--8-8---------------|-12--8-8---------------|
|----------------10--10-|----------------10--10-|
|-------------12-----10-|-------------12-----10-|
|-----------------------|-----------------------|
|-------------10-----8--|-------------10-----8--|
|-8---------------------|-8---------------------|

Outro:

  Dm               C                A#      Dm C
|-5-------------0--3-------------1----1-----1--3-|
|----6-6--------------5-5-----------3---3------1-|
|----------------------------------------------0-|
|-------------------------------------------0--2-|
|-5----------4-----3----------2-----1----------3-|
|------------------------------------------------|