Apologies if this has already been posted( i did a search but couldn't find it)
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"In compiling the Third Edition of How to Draw and Sell Comic Strips, it quickly became apparent that it would not be possible to find space for all the picture material I wanted to include. ...
However, these days we have an Internet and it's now much easier to make available material that has been squeezed out of a print publication by offering it on a supporting web site. Which is what I'm doing here. So enjoy the material we didn't have room for in How to Draw and Sell Comic Strips, material that should help illustrate my points more fully."
http://www.thestoryworks.com/howtodraw/default.htm