 In a first proposal of March, 1853, Aristide Cavaillé-Coll suggested a two-manual instrument, partially reusing material of the Van Peteghem organ.A second proposal also suggested a two-manual instrument with almost identical disposition.The third proposal of September 3, 1853 describes the final three-manual organ in a new case with 16' pipes in the front ("Grand Orgue dit de seize pieds en Monfre").