Complex sentence: Practising throughout 1899 and 1900, Bosanquet began to use the new delivery in minor matches before first using it in first-class cricket against Leicestershire, in the match in which he scored two centuries.
Split into simpler sentences: Practising throughout 1899 and 1900, Bosanquet began to use the new delivery in minor matches before first using it in first-class cricket. Bosanquet first tried the delivery in the same match in 190x against Leicestershire in which he scored two centuries.