See Rossel-Peugeot.

Below we provide a diagram of the type of engine and a partial design where we can guess the rest.

“Peugeot-Rossel”

-This brand is a union of Rossel and Peugeot to build these rotary engines around 1909.

-The fruits of this collaboration were the Type A with 7 cylinders giving 35 CV and another one, Type B giving 45 CV. Design and function are like the Gnome engines.

-Other engines that were built were a 4-cylinder of 100 hp and some Farcots under license.

From Appendix 10: This engine appears in a document with the name of Rousell-Peugeot and that the author interprets as an error since over the years it has always been Peugeot-Rossel. I don't think it is a new engine.

“Two Peugeot-Rossel engine views”

-Precisely the first photograph shows us the rear of this practically unknown engine from the year 1910.