Certainly Gillette would have needed Doyle’s consent to write an original work involving Sherlock Holmes, as the character was under copyright, but it is presumed by most Sherlockians that Gillette wrote the whole thing himself.
Desigur, Gillette ar fi avut nevoie de acordul lui Doyle pentru a scrie o operă originală cu Sherlock Holmes, deoarece personajul era sub drept de autor, dar se presupune de cei mai mulți fani ai lui Sherlock Holmes că Gillette a scris totul el-însuși.