Complex sentence: He helped organize the first bicycle club in America: the Boston Bicycle Club formed February 11,1878 with 14 members and was the first and only American of the C. T. C of England, originally the Bicycle Touring Club.
Split into simpler sentences: He helped organize the first bicycle club in America: the Boston Bicycle Club. Weston was also the first and only American of the C. T. C of England, originally the Bicycle Touring Club.