Someone asked a good question following my citations webinar last week (still listenable here if you're an Illinois State Genealogical Society member): how do you deal with a situation where the image you have cited is no longer on line?
For me, and I'm sure many others, it's not an academic question. Thanks to a typically non-transparent Chicago contract negotiation, FamilySearch no longer provides images for many Cook County, Illinois, records, including this one which figures in my talk coming up in May at the National Genealogical Society conference in Las Vegas:
City of Chicago, Department of Health, Record of Death no. 2510, George Edw. Chilcote 1914; digital image, “Illinois, Cook County Deaths, 1878-1922,” FamilySearch (http://www.familysearch.org : accessed 28 September 2011), citing Family History Library microfilm 1,239,982.
Harold Henderson, "It's Gone! Now What?," Midwestern Microhistory: A Genealogy Blog, posted 20 February 2013 (http://midwesternmicrohistory.blogspot.com : accessed [access date]). [Please feel free to link to the specific post if you prefer.]