Missing Brush Tutorial

I somehow found an article on using brushes and the demo illustration was quite intricate and the author also had 4 brushes to download. I foolishly didn’t bookmark the article. I have the brushes but wanted to see the tutorial again as the author clearly explained how they used each of the brushes.

The brushes have names like “wavy snail”.

If anyone knows this tutorial and could post a link, that would be so much appreciated!
Thanks very much!