Raymond began writing what is known as the "Legenda Major", his "Life" of Catherine, in 1384, and completed it in 1395.
Različni viri so še posebej pomembni, zlasti dela blaženega Rajmunda iz Capue, ki je bil duhovni vodja Katarine in njen tesen prijatelj od 1374 pa do smrti, in je 1380 postal general dominikanskega reda.