De Vico made beautiful drawing at the observatory of Collegio Romano around 1840, using the 6" Cauchoix refractor.These lithographies, made by Francesco Rondoni, were published in the "Memoria intorno ad alcune Osservazioni fatte alla Specula del Collegio Romano". In the volume for 1840-41 (p. 22-29) are shown: M 31, M 42; in the volume for 1843 (p. 27-28) are shown: M 13, M 51 and an unknown nebula. In "Memoria intorno a parecchie osservazioni dell' Universita Gregoriana in Collegio Romano", 34-37 (1839), another drawing of M 42 is shown.
Obituary: MNRAS 9, 65 (1849); A. Secchi: Memorie dell' Osservatorio dell' Universita Gregoriana in Collegio Romano, 133-149 (1850)
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