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The manuscript Add MS 73525 at the British Library is a random collection of seven folios, on which five different text fragments are found. The content of the first six folios is identified. Folio 7 presents an unknown script in wonderful workmanship, with three colours. Deciphering the script revealed ecclesiastical texts in English with a writing system based on monoalphabetic substitution extended by a rich set of alternative forms, ligatures and abbreviations. Although the author's name and the date of writing is given in the text, there is not enough information to identify the person and to decipher the numerals of the date. The process of deciphering is described in the paper, followed by the substitution tables of the alphabet, the ligatures and abbreviations, and the numerals. Finally, the transliterated text is provided with remarks.
Király et al. (Mon,) studied this question.