Click on the image right for a link to a high-resolution image of the Ariel Cycle and Motor Works in 114 Nicholson Street in Footscray circa 1910 held by the Footscray Historical Society.
They were manufacturing cycles and motorcycles from around 1910, to at least 1925. Later they made cycles through to the 1950's
More details can be found in Robert Saward's book: A-Z of Australian-made Motorcycles (Turton and Armstrong, Sydney 1996, ISBN 0 908031 64 5).
Pictures of Ariel bicycles can be found here. I would be pleased to get photos of other Footscray Ariels.