this is the author in question - http://en.wikipedia.org/wiki/James_Stewart_(mathematician) ..
his book was actually pretty good and I could use it for about 3 classes in my calc sequence.. pretty good value for money
How much has undergraduate level calculus really changed in the last 200 years? The constant updates disrupted the used textbook market and drove sales of new books.
http://www.archive.org/details/differentialinte00osborich
You'd have to come to your own conclusions on the differences though, analyzing math books can take a while. :) The form is quite different.
(I searched "project gutenberg calculus" with no quotes and that was hit #1. The second result appears to come from 1865, so maybe I should have spent just a bit longer with that page.)
http://online.wsj.com/article/SB123872378357585295.html#arti...
Quite nice, I think. And tasteful.