Since Charles Schulz's death, United Feature Syndicate has been running Peanuts strips from many years ago. If I recall correctly, some of the first reruns were from the '70s.

Right now, they're running strips from 1959, and if you hurry, you'll find, in the 30-day online archive:

• The last few strips of Linus' first "Great Pumpkin" disappointment: "I was a victim of false doctrine."
• Linus' ambition to be a "world-famous humble little country doctor": "I love mankind... it's people I can't stand!"
• The introduction of Pig-Pen: "He may be carrying soil that was trod upon by Solomon or Nebuchadnezzar or Genghis Khan."

I first encountered these strips in the Peanuts paperbacks my grandmother gave me. (She also infected me with a love of Pogo.) These strips are from the golden era of Peanuts, and it's nice to know that a new generation of comics-readers are seeing them for the first time.