The very idea that he came, as he said, to preach a new or a fifth Veda, which had been lost, shows how well he knew the strong and weak points of the theological system he came to conquer.
Source, in full
Max Müller, about the allegation and story that Roberto de Nobili was the author of a forged document (fifth Veda). Quoted from Malhotra, R., Nīlakantan, A. (Princeton, N.J.). (2011). Breaking India: Western interventions in Dravidian and Dalit faultlines