Just over a week ago I made the brave move to contact someone I have cited several times as a source. Nuria Yáñez-Bouza and María E. Rodríguez-Gil created the Eighteenth Century English Grammars database. I have referenced their work in two annotated bibliographies and am now at a place in my research where I need to access the actual grammars.
I heard back from Yáñez-Bouza and received immediate access to the database! I have not yet logged in, but I am excited to do so. I hope it isn't anticlimactic.
It appears that my final project (in 8 more classes!) at Arizona State University's New School of Interdisciplinary studies may be an application of David Wilton's analysis of grammars on a spectrum of methodology (normative / non-normative) and motivation (aspirational v. observational).
Wow! I have my final project as a result of my first class!
Wilton, David. "Rethinking the Prescriptivist–Descriptivist Dyad: Motives and Methods in Two Eighteenth-Century Grammars." English Today 30.3 (2014): 38-47. E-Journals. Web. 1 Feb. 2016. PDF File.
Yáñez-Bouza, Nuria & María E. Rodríguez-Gil. 2013. The ECEG database. Transactions of the Philological Society 111(2), special issue ed. by Yáñez-Bouza & Rodriguez-Gil ' English Grammar Writing in the Eighteenth Century'.