His captors took Corbet to the Royal Court House in the market square where De Rullecourt convinced Corbet that thousands of French troops had already overwhelmed Jersey. De Rullecourt threatened to burn the town and slaughter the inhabitants if Corbet did not sign a capitulation. In addition, Corbet was to order the commander at Elizabeth Castle to surrender. Corbet replied that as he was a prisoner he had no authority and that anything he signed would "be of no avail". De Rullecourt insisted and so Corbet, to avoid further harm to St Helier, signed.