This was an 8-foot instrument with two 48-note manuals and a 28-note independent pedal. Over the years the organ was to go through major extensions and overhauls, culminating in a complete rebuilding in 1888-1890 by Aristide Cavaillé-Coll. Of the original, parts of the case survive and about 40% of the pipework. Carlier returned to Laon in 1631. He also worked on an organ, now lost, at Saint-Nicolas-des-Champs in Paris between 1632 and 1636. Carlier introduced a number of fundamental innovations in organ design from northern Europe to France. His work shows strong similarities to that of the Langhedul family. He may have benefited from working with Jan Langhedul in Rouen. From 1631 onward Carlier collaborated with Matthijs Langhedul on the organ at St. Jacques de la Boucherie in Paris, which introduced important innovations. The organ builder Wangnon from Liége was one of his disciples. Another pupil was Pierre Thierry (1604-1665) who renovated the organ at Saint-Gervais. Thierry worked with Carlier between 1634 and 1635 at St. Nicholas-des-champs. Citations  Sources