From a document: An engine that seems to have been built by an industrial engine manufacturer. It was an engine with four horizontal cylinders but it is understood as two double cylinders. Perhaps there is a confusion with the Frenchman Causing.

-In fact there were four pistons and two long cylinders that contained pairs.

-They meet in the center. There is a crankshaft at each outer end. Without further details for the moment.

-This description matches the Frenchman Nemorin Causan's engine and his patents.