In the spring of 1776 Congress was inconsiderate enough to impose upon Franklin a journey to Montreal, there to confer with General Arnold concerning affairs in Canada. It was a severe, even a cruel task to put upon a man of his age; but with his usual tranquil courage he accepted the mission. He met the ice in the rivers, and suffered much from fatigue and exposure; indeed, the carelessness of Congress was near depriving the country of a life which could not have been spared. On April 15 he wrote from Saratoga: "I begin to apprehend that I have undertaken a fatigue that at my time of life may prove too much for me; so I sit down to write to a few friends by way of farewell;" and still the real wilderness with all its hardships lay before him. After he had traversed it he had the poor reward of finding himself on a bootless errand. The Canadian enterprise had no possible future save failure and retreat. There was absolutely nothing which he could do in Canada; he was being wasted there, and resolved to get away as soon as he could. Accordingly he made his painful way homeward; but worn out as he was, he was given scant opportunity to recuperate from this perilous and mistaken journey. The times called upon every patriot to spend all he had of vigor, intellect, money, life itself, for the common cause, and Franklin was no niggard in the stress. In the spring of 1776 the convention charged to prepare a constitution for the independent State of Pennsylvania was elected. Franklin was a member, and when the convention came together he was chosen to preside over its deliberations. It sat from July 16 to September 28. The constitution which it presented to the people established a legislature of only one house, a feature which Franklin approved and defended. At the close of the deliberations thanks were unanimously voted to him for his services as presiding officer, and for his "able and disinterested advice."