Assertion: pope's work | /r/HasProperty | libellus de supplemento
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text: Another important work written after Catherine's death was Libellus de Supplemento (Little Supplement Book), written between 1412 and 1418 by Tommaso d'Antonio Nacci da Siena (commonly called Thomas of Siena, or Tommaso Caffarini): the work is an expansion of Raymond's Legenda Major making heavy use of the notes of Catherine's first confessor, Tommaso della Fonte (notes that do not survive anywhere else).