Credits to the original uploader. I just snatched the files from Mega before the link went down and changed the names for every files. I did it because the original names were a little fuzzy, annoyingly in all caps, one of them have a typo, etc. But I mainly did it for myself being a organization freak. The new names are all based on the conventions inside the pdf files so I hope you won't get bothered by it e.g. STILLLIFE1→Still_Life_Phase_I_–_Palettes, STILLLIFE2→Still_Life_Phase_II_–_Patinas_and_Flowers.
http://www.wattsatelier.com/online/
http://www.wattsatelier.com/online/