Except for the fact that R Pearse did not claim to have flown in 1903 at all,ISTR that originally he claimed to have flown in 1904 but revisionists have changed that date to 1903 - it sort of weakens your case when Pearse himself did not claim it !
He never claimed that, he certainly flew (lots of witnesses) but never claimed to have satisfied himself with the fully controlled criteria. That came later.
He made (from memory) four flights in 1903.