I just checked out the reference to the architect John Foulston "emulating the renowned Romeo Coates in the singularity of the vehicle which served him as a gig" in George Wightwick's 1857 Bentley's Miscellany piece "Life of an architect" (see Imaginary prison and an elephant portfolio). The person in question was the famously eccentric dandy and actor Robert Coates (1772-1848).
Another highlight from John Foulston's 1838 The public buildings erected in the West of England as designed by John Foulston F.R.I.B.A.: his rejected design for Bristol Gaol. He was sore about the rejection, and shows it.
I've not yet visited the Devonport Column, which has now been open to the public for nearly a year. But last year I had a look at John Foulston's The public buildings erected in the West of England as designed by John Foulston F.R.I.B.A. (1838), which has some background: "The manner of raising and setting the stones, in the erection of the Devonport Column is, he [the author] believes, perfectly novel, and will not fail to interest the young practitioner".
I'm very pleased to see that the Isle of Wight County Press, after a few months' delay, just ran a piece on A Wren-like Note: "Secret life of a Victorian novelist" (Richard Wright, IWCP, 11 Apr 2014, Weekender section, p7).