The catalogue raisonné was begun by Andrew McLaren Young, who died before its completion. The catalogue lists approximately 560 paintings by the artist, all illustrated. With few exceptions, the authors included only paintings ascribed to Whistler in his lifetime (or were exhibited in his memorial exhibitions of 1904-1905). The catalogue also includes lost & destroyed works, as well as several works the authors consider doubtful. An updated online catalogue raisonné of the paintings is currently in preparation (see in-process entry cited in this database).