Becker 's correspondence with Weyl has been reconstructed ( see bibliography ) , as Weyl 's copies of Becker 's letters to him are preserved .
Becker often extensively quotes or paraphrases Weyl 's own letters .
Becker 's correspondence with Weyl has been reconstructed ( see bibliography ) , as Weyl 's copies of Becker 's letters to him are preserved , and Becker often extensively quotes or paraphrases Weyl 's own letters .