Complex sentence: The second session of the Convention, which took place in Sydney in September 1897, saw Walker appointed to a subcommittee on federal finance, which proposed a financial scheme based on Walker's Bathurst proposal that was adopted by the Convention.
Split into simpler sentences: The second session of the Convention took place in Sydney in September 1897. Walker was appointed to a subcommittee on federal finance, which proposed a financial scheme based on Walker's Bathurst proposal that was adopted by the Convention.