co-star with him for The Ghost of Slumber Mountain (1918). The collaborative film combined live-action with animated dinosaur models in a 45-minute film, but after the premiere it was cut down to approximately 12 minutes. Dawley did not give O'Brien credits for the visual effects, and instead claimed the animation process as his own invention and even applied for patents. O'Brien's stop motion work was recognized as a technique to create lifelike creatures for adventure films. O' Brien further pioneered the technique with animated dinosaur sequences for the live-action feature The Lost World (1925). Helena Smith Dayton New York artist Helena Smith Dayton, possibly the first female animator, had much success with her "Caricatypes" clay statuettes before she began experimenting with clay animation. Some of her first resulting short films were screened on 25 March 1917. She released an adaptation of William Shakespeare's Romeo and Juliet approximately half a year later. Although the films and her technique received much attention of the press, it seems she did not continue making films after she returned to New York from managing a YMCA in Paris around 1918. None of her films have yet surfaced, but the extant magazine articles have provided several stills and approximately 20 poorly printed frames from two film strips. Starewicz in Paris By 1920 Starewicz had settled in Paris, and started making new stop motion films. Dans les Griffes de L'araignée (finished 1920, released 1924) featured detailed hand-made insect puppets that could convey facial expressions with moving lips and eyelids. Other silent stop motion One of the earliest clay animation films was Modelling Extraordinary, which impressed audiences in 1912. The early Italian feature film Cabiria (1914) featured some stop motion techniques. 1930s and 1940s Starewicz finished the first feature stop motion film Le Roman de Renard (The Tale of the Fox) in 1930, but problems with its soundtrack delayed its release. In 1937 it was released with a German soundtrack and in 1941 with its French soundtrack. Hungarian-American filmmaker George Pal developed his own stop motion technique of replacing wooden dolls (or parts of them) with similar figures displaying changed poses and/or expressions. He called it Pal-Doll and used it for his Puppetoons films since 1932. The particular replacement animation method itself also became better known as puppetoon. In Europe he mainly worked on promotional films for companies such as Philips. Later Pal gained much success in Hollywood