1866 Invoice from William Dearing and Son

The 1866 invoice from William Dearing and Son is the second key clue that confirms the temporal anomaly. The Doctor examines it alongside the pristine statuette, noting that the paper is brand new—ink fresh, edges unyellowed—despite the 1866 date. This contradiction is impossible under normal circumstances, reinforcing the Doctor’s deduction that the antiques are being brought from the past. The invoice functions as a temporal paradox: it is both a genuine historical document and a product of the present, defying the linear flow of time. Its role in the event is to underscore the unnatural forces at play in the shop and to propel the Doctor and Jamie toward the locked back room, where the source of the anomaly likely lies.

The 1866 invoice from William Dearing and Son is pivotal in exposing the shop’s temporal deception. The Doctor uses it to demonstrate the impossibility of the artifacts—'This is brand new'—contradicting its dated provenance. This object, alongside the statuette, becomes irrefutable evidence of the shop’s unnatural state, driving the Doctor’s interrogation of Perry and setting the stage for the TARDIS’s discovery. Its pristine condition underscores the Daleks’ temporal meddling.