These album leaves are part of a section of the illustrations of costumes from the Qianlong court, Huangchao liqi tushi (“The Regulations for the Ceremonial Paraphernalia of the [Qing] Dynasty”). Qianlong Emperor commissioned Prince Yunlu (1695-1767) to lead the editorial team, including scholar-officials and painters, in compiling the final regulations, which were published in 1759. Aside from costumes, Huangchao liqi tushi also includes descriptive texts and colourful illustrations of the instruments and devices used in imperial rituals.
"2004.19.1 - Illustrations of Costumes from the Qianlong Court, Mactaggart Art Collection." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/21-19066. Accessed 03 Oct. 2023.