The URL:
shows a section of File:Godward_Idleness_1900.jpg, cropped according to the values: 65,81,35,15.
We also hold those values in Wikidata, using "relative position within image (P2677)", aka "IIIF syntax relative position" - see the "kitten (Q147)" value at:
https://www.wikidata.org/wiki/Q19953492#P180
We need a user script (maybe one day a gadget) to add a link like the example above, including the applicable value of "image (P18)", to the IIIF values displayed on the Wikidata item.
Please can someone make one?