Ariel, 1902, Great Britain, the probably most unusual and most popular model of that factory, producing from 1902 until 1966 at Birmingham, was the "Square Four": this was that 4-cyclinder-model, which was constructed for the first time not as common - four cylinder lengthways - but arranged in square! That is why the model got by on a shorter wheelbase. Originally the factory had been established in 1892 and had been grown out of a fusion of several smaller factories. The production had been stopped in 1965.
The Irish man Sammy Miller took care of great sports successes in Trial towards the end of relative long history of the mark. He won on the Trial-500-cc-ohv-one-cyclinder five times one behind the other the British Trial Championship and had been two times the overall winner of the Scottish Six Days Trial