My students often ask about the difference between drawing and illustration. Certainly, as our culture has become more visually oriented and art has interjected itself into almost every aspect of our society, the lines have become blurred. However, in my opinion it all boils down to intent. Illustrations are intended for commercial use, whether they convey an emotion, idea or just depict a given image, they are in the public, mass media, realm of the graphic designer and illustrator. Drawings, on the other hand, are intended to convey a concept or emotion, to deliver a message that has meaning to both the viewer and artist; sometimes to the artist alone.
Purists will insist that a drawing is never assisted by mechanical or technological means such as projectors, but I disagree with this assertion in that the tools available to the illustrator should also be cherished by the artist. Again, intent is key, not technique. HOWEVER, I do agree that being a skilled draftsman is important in any aspect of art. It's a skill that is fast disappearing.
Below are two categories for my illustrations: those that have been published and those that have not. For the published works, the copyright is owned by the publisher, whereas the others belong to the artist. I would ask you to respect copyright and NOT download images without permission of the publisher in the first instance, or myself in the latter.