The Starry Night
He is the author of an acknowledged "catalogue raisonné" of Van Gogh's work, published in 1978, revised in 1989 and again in 1996. His catalogue numbers are preceded by a 'JH': thus JH1731 refers to the 1889 oil painting "The Starry Night" (previously catalogued by Jacob Baart de la Faille as F612).