The Silent Horror of Otto Rippert

Otto Rippert (1869-1940) had a directorial career spanning from 1913 to 1924. Out of his dozen or so feature-length films, he directed four horrors that are either lost or simply not available.

1. Homunculus - Homunculus is a six part serial dealing with the creation of an artificial man. Before The Golem, Alraune, and Metropolis, this film dealt with the theme of artificial life built from scratch. A scientists builds a homunculus, an artificial man; when the homunculus discovers that he is artificial, has no soul, and that true love can never be his, he is furious and uses his superpowers to begin a tyrannical reign of terror.
Early serials were often excellent, unintentionally avant-garde, like Louis Feuillade's Les Vampires and Judex. To my knowledge, Homunculus would be the first horror serial. It's a shame it isn't available.
Pictures:
The homunculus
http://farm4.static.flickr.com/3139/3054722397_7c0cd65195.jpg?v=0
The homunculus shows his amazing strength
http://farm4.static.flickr.com/3225/3054722437_5e80e2a980.jpg?v=0
The homunculus rescuing(?) a child (Edit: It's very clearly a dog, what was I thinking?)
http://farm4.static.flickr.com/3177/3055557960_41bc7b9a1c.jpg?v=0
The homunculus, not looking terribly happy
http://farm4.static.flickr.com/3036/3054722461_209087e4a7.jpg?v=0

2. Das Verwunschene Schloß (The Haunted Castle) - There's not a lot available on this one. From what I can gather, a Count flees from something or other and leaves the castle without an heir. The castle is haunted and casts strange lights over the village. A farmer guards the castle and is trying to get an heir from the Count's daughter. If anyone can clear this up, please do. Werner Krauss (who played Dr. Caligari) is in this one.
Pictures:
(Alas, none could be found.)

3. Totentanz (The Dance of Death, or Danse Macabre) - Written by Fritz Lang, this is unfortunately a lost film. Doug Sederberg writes in the IMDB plot summary,
"In this apparently lost film, a beautiful dancer's sexual allure is used by an evil cripple to entice men to their deaths. Falling in love with one of the potential victims, she is told by the cripple that he will set her free if her lover, actually a murderer himself, survives and escapes a bizarre labyrinthe which runs beneath the cripple's house."
It sounds fantastic! It's a shame it's lost. Even if it weren't lost, would it be available?
Pictures:
A woman (the dancer?) and a man lie slumped, another man is entering from behind
http://farm4.static.flickr.com/3004/3054722531_462c0384d8.jpg?v=0

4. Die Pest in Florenz (The Plague in Florence) - Another Fritz Lang script, this time adapting Poe. Again, I give you a synopsis from Mr. Sederberg,
"Suddenly appearing in Florence, an evil seductress causes Cesare, the city's ruler, and his son to both fall madly in love with her. The son, killing his father before an order to torture the woman can be carried out, then turns the city's churches into dens of sexual debauchery. Acts of evil and corruption continue unabated until the arrival of Death, who brings with her a horrible plague which she is about to loose upon the city."
This film, which also sounds amazing, is still extent, but is simply not available. A Fritz Lang-penned German Expressionist silent Poe adaptation and it's not available? Where is justice in the universe?
Pictures:
Death (or some creepy monk) walks with a young lady:
http://farm4.static.flickr.com/3271/3054722277_88426b79a3.jpg?v=0
Cesare's son and the seductress? Note the deep focus, long before Citizen Kane.
http://farm4.static.flickr.com/3019/3055557852_c2a08858a2.jpg?v=0

[Fritz Lang also wrote a third script for Otto Rippert, Die Frau mit den Orchideen (The Woman with the Orchid)--also starring Werner Krauss--but it's a melodrama, not a horror.]