Complex sentence: George Jackson proposed a route to the Thames and Canal Committee in 1788 which passed behind Audley End and through Saffron Walden, which was surveyed by Samuel Weston, as Whitworth was busy in Scotland.
Split into simpler sentences: George Jackson proposed a route to the Thames and Canal Committee in 1788, which passed behind Audley End and through Saffron Walden. This was surveyed by Samuel Weston, as Whitworth was busy in Scotland.