The Gold Cloud dates from 1890/1891. It is included in a list of works that Whistler held in stock (priced at 80 guineas), and a shorter list of paintings in stock. 1
It is catalogued in MacDonald 1995 (cat. rais.) [more] (cat. no. 1173) dated 'c. 1888'.
Notes:
1: [1890/1891], GUW #13236, and #13237. Both include a work sold on 22 August 1891, and other works dating from earlier.