I revisit one of the iconic Chicago School studies, Clifford Shaw's "The Jack-Roller". A naive reading of Shaw's book leaves the reader with a sense of having been inducted into a melange of what we now know as "sociology" and "social work," but which to Shaw seems a coherent stance. I suggest that this is close to the heart of how things were, and not a temporary distortion in the distinct histories of sociology and social work. I develop and illustrate this argument through a hidden history of an intellectual case for reciprocity between the two disciplines as seen in some barely noticed work of Ernest Burgess. I conclude with a suggested rereading of "The Jack-Roller" that supports a relationship between sociology and social work based on egalitarian respect and a commitment to practicing history in the sense of positioning ourselves in a historical context. (Contains 19 notes.)