Complex sentence: According to Thomas Curson Hansard these were cut by punchcutter Richard Austin of London; this attribution is accepted by Austin's biographer Alastair Johnston (Hansard was writing in 1825, towards the end of Austin's career) although Mosley has expressed caution on the attribution.
Split into simpler sentences: According to Thomas Curson Hansard these were cut by punchcutter Richard Austin of London. This attribution is accepted by Austin's biographer Alastair Johnston (Hansard was writing in 1825, during Austin's lifetime) although Mosley had earlier expressed caution on the attribution.