Lockyer was a very good artist and observer, and his drawings of 1862 are the best available, though there are some other good drawings in the literature. The map given by David is also included in the famous book by Flammarion, and it relied quite a lot on the drawings of W.R.Dawes, whose originals I published in the Journal many years ago. I have seen the hand-drawn original coloured version of the Phillips map, but I do not have the copyright permission to post an image of it here. Comparison shows that once again the engraver did not really do the original map justice. Had Schiaparelli found a more sympathetic engraver who could have rendered the famous 1877 drawings in a closer manner to the originals I am sure that the debate about the martian canals would have evolved differently.