Robespierre, Pétion, Danton, and Brissot dominated the Jacobin Club. On 17 July 1791, Danton initiated a petition. Robespierre went to the Jacobin club to cancel the draft of the petition, according to Albert Mathiez. Robespierre persuaded the Jacobin clubs not to support the petition by Danton and Brissot. After the Champ de Mars massacre, Danton escaped from Paris and then lived in London for a few weeks. Since Jean-Paul Marat, Danton, and Robespierre were no longer delegates of the Assembly, politics often took place outside the meeting hall.