He found that his sponsor Royal Governor Robert Rogers was under suspicion of plotting treason against England. On December 6, 1767, Rogers was arrested, charged with treason, placed in irons and put in solitary confinement. While he spent a miserable winter in an unheated guardhouse, Carver probably spent time preparing his journal of the expedition for publication. In the spring of 1768 the first ship of the season took Carver and Rogers both to Detroit. Carver travelled in the relative comfort of a passenger cabin, while Rogers was forced to sit out the journey seated upon the ballast rocks in the hold of the ship. Rogers was taken to Montreal to be court-martialed, and although he was found not guilty of the charges against him, he was not returned to his position as Royal Governor. Carver submitted a list of expenses to his superiors, but payment was denied on the grounds that Rogers had not had sufficient authority to order such an expedition.