After some ten or fifteen years in Quebec, he changed the spelling of his name to "Kimbert" or "Kimber" to give it a more French sound.

He qualified to practise medicine in 1811 and set up practice at Trois-Rivières, including as physician to the local Ursuline convent.

The house was decorated with transparencies and slogans, such as "Long Live Papineau and Viger" and tributes to liberty and the people, along with fruits and garlands and cardboard cut-outs.

Kimber, in a mischievous spirit, plied his male guests with considerable amounts of fine wines, port and madeira, to the point that, according to Papineau, in the morning some of them could not recall the events of the night before.

[1] He supported the Ninety-Two Resolutions, which Papineau introduced in the Assembly, calling on the British government to make major reforms to the constitutional structure in Lower Canada.

Two years earlier, the Parliament had passed a bill for Jewish emancipation, to put Jews on the same footing as Christians.

[4] In December 1837, after the outbreak of the Rebellion, he wrote a letter to Louis-Hippolyte LaFontaine, in which he accused Papineau of treachery in having misled his supporters about his ultimate goals.

Kimber correctly predicted that Lower Canada would be put under a provisional government or martial law, and stated that he held to positions of constitutional reform, not revolution.

[8] As a result of the Rebellion, the British government suspended the constitution of Lower Canada, including the Parliament, ending Kimber's position in the Legislative Assembly.

[1][14] After the death of her first husband, Kimber's sister Clotilde married Charles Langevin, who represented Hampshire in the Legislative Assembly of Lower Canada.

[3] In his will, Kimber left his gold watch, chain and seals to his friend, Dr Wolfred Nelson, who had been a leader of the Patriotes and had taken up arms in the Rebellion.