Complex sentence: From the middle of the 19th century into the 1890s, the prospects of a national bank forming grew and in 1911 the Commonwealth Bank was established, but did not have the authority to print notes, which was a power that was still reserved to the Treasury.
Split into simpler sentences: From the middle of the 19th century into the 1890s, the prospects of a national bank forming grew. In 1911, the Commonwealth Bank was established, but did not have the authority to print notes, which was a power that was still reserved to the Treasury.