A Modern Dance of Death: A portfolio of prints by German artist Joseph Sattler (1867–1931), c. 1894

The images come from a 1912 Berlin edition scanned by Heinrich Heine Universität Düsseldorf, with a handful from what appears to be a Berlin/London edition (in French) held by the Public Library of Cincinnati and Hamilton County.

The German wikipedia entry tells us that Sattler is a big name in Art Nouveau remembered especially for his illustrations in Simplicissimus and Pan.

via Peacay (are you not following BibliOdyssey on tumblr?). See also his post "Danse Macabre Collection."