Robert developed a reputation as being a pious monk, an accomplished diplomat, a skilled organiser and a great lover and collector of books. Under Robert de Torigni Mont Saint-Michel became a great centre of learning, with sixty monks producing copious manuscripts and a library collection so vast it was called the
Cité des Livres ('City of Books'). Robert himself was called "The Great Librarian of the Mont". He made no attempts to interpret history but wrote plainly "without a trace of romance in his soul." The 19th-century English archivist
Joseph Stevenson said Torigni was not always correct in his chronology and made errors even in matters in Normandy of which he should have known better, yet he was always honest and truthful and his mistakes did not greatly affect the overall value of his chronicle. Modern writers too have pointed out errors in his work; and where he has given confusing or conflicting accounts.
Léopold Delisle wrote that it was through Robert's affection for Henry II that he made almost no mention in his chronicle of the death of
Thomas Becket or Henry II's involvement therein. ==Works==