Mrs. Swan accompanied her husband on several subsequent trips to Paris, and it was on one of these occasions that the colonel came to great grief. He had contracted, it is said, a debt claimed in France to be two million francs. This indebtedness he denied, and in spite of the persuasion of his friends he would make no concession in the matter. As a matter of principle he would not pay a debt which, he insisted, he did not owe. He seems to have believed the claim of his creditor to be a plot, and he at once resolved to be a martyr. He was thereupon arrested, and confined in St. Pelagie, a debtor's prison, from 1808 to 1830, a period of twenty-two years! He steadfastly denied the charge against him, and, although able to settle the debt, preferred to remain a prisoner to securing his liberty on an unjust plea.... He gave up his wife, children, friends, and the comforts of his Parisian and New England homes for a principle, and made preparations for a long stay in prison. Lafayette, Swan's sincere friend, tried in vain to prevail upon him to take his liberty.[9] Doctor Small, his biographer, tells us that he lived in a little cell in the prison, and was treated with great respect by the other prisoners, they putting aside their little furnaces with which they cooked, that he might have more room for exercise. Not a day passed without some kind act on his part, and he was known to have been the cause of the liberation of many poor debtors. When the jailor introduced his pretended creditor, he would politely salute him, and say to the former: "My friend, return me to my chamber." With funds sent by his wife, Swan hired apartments in the Rue de la Clif, opposite St. Pelagie, which he caused to be fitted up at great expense. Here were dining and drawing rooms, coaches, and stables, and outhouses, and here he invited his guests and lodged his servants, putting at the disposal of the former his carriages, in which they drove to the promenade, the ball, the theatre--everywhere in his name. At this Parisian home he gave great dinners to his constant but bewildered friends. He seemed happy in thus braving his creditors and judges, we are told, allowed his beard to grow, dressed a la mode, and was cheerful to the last day of his confinement.