 Caspar's notes were passed on to Aryon Dall’Igna Rodrigues, a Brazilian linguist who wrote his dissertation in German on Tupinambá at the University of Hamburg.He wrote an eighty-paged description on Tuparí based on Caspar's notes, however it was never published.It is believed to be because, while he had come up with a description of the language, he had never done any fieldwork in the community himself.