ProTag constructions – pronouns that appear in the right periphery and which do not have the clarificatory function of right-dislocated constituents – are non-canonical in two senses: (i) they represent an addition to a syntactically and semantically complete and coherent ‘basic’ structure, and (ii) they are a feature of colloquial spoken British English/non-standard dialects, and hence are infrequently attested. Recent work on ProTags has elucidated their properties in Present Day British English and in a small sample of Early Modern English data. Focusing on demonstratives used as ProTags, this chapter builds on earlier work by examining the occurrence of ProTags in a larger corpus covering a greater time span. This investigation reveals that demonstrative ProTags, though rare, are attested from the late sixteenth century. Mycock & Misson’s (2020) finding that the most commonly used demonstrative ProTag in Early Modern English was this switching to that by the twentieth century is not only confirmed, but shown to be a relatively recent change. It is also revealed that the frequency of overt antecedents has decreased over time. We consider the implications of these changes and the factors that motivate the presence of what appears to be a completely superfluous pronoun.