Kammala jumla mai zuwa: Morrison ya kasance farkon mai goyon bayan motsi na gyara a Upper Canada kuma ya halarci tarurruka don ƙarfafa canjin siyasa. Ya yi magana akai-akai game da tawaye da makamai kuma ya karfafa William Lyon Mackenzie don ci gaba da neman goyon baya ga gyaransa. Bai shiga cikin
Upper Canada Tawaye kuma ya kasance a cikin gidansa maimakon. Duk da haka, an kama shi kuma aka tuhume shi da cin amanar ƙasa don shirya da kuma aiwatar da tawayen kuma ba a same shi da laifi ba a shari'ar da ta biyo baya. Tsoron ƙarin caji, Morrison ya gudu zuwa Amurka kuma ya ci gaba da aikin likita. Lokacin da aka ba da afuwa ga mafi yawan mahalarta tawaye a 1843, ya koma Toronto don ci gaba da aikinsa na likita kuma ya yi aiki a kan kwamitocin likita daban-daban. Ya mutu a ranar 19 ga Maris, 1856, na cutar shan inna a Toronto.