Translate the following English sentence to French:
"In conclusion, I wish to thank our Commissioner, Mr Philippe Busquin, for undertaking, as soon as he arrived, this investigation into a European research area which we support."
Pour terminer, je remercie notre commissaire, M. Philippe Busquin, pour avoir engagé, dès son arrivée, cette réflexion sur l'espace commun que nous soutenons.