In English
Anstey was principally known for his long epistolary poem, The New Bath Guide. He never quite recaptured the success of that work, which was continuously in print throughout his lifetime, although he returned to humorous depiction of the same Bath types in such works as An Election Ball and "The Decayed Macaroni". Finding little to admire in such sequels, Horace Walpole judged that Anstey "ought to have shot himself the moment he had finished the Bath Guide", but others since have seen more to respect.
Gray described the Guide as having "a new and original kind of humour", although in terms of the Classical models of his time it could be described as satire on the good-natured Horatian model. The alternative sharp Juvenilian style of the recently deceased satirist Charles Churchill was not for him. Indeed, in an unfinished poem preserved by his son, he had declared himself
Instead he made his subject matter the familiar follies of the landed squirearchy in a poem that, "while it includes a number of particular and topical Bath references to give the flavour of the place and time, has sufficient scope and is written from enough of a detached viewpoint to make its critique of manners and morals of enduring application." The work's eventual frontispiece clarifies Anstey's good-natured aim. Pictured there is a procession of the fashionable headed by a monkey and a Momus clown with, in leash, the fashionable crowd they lead by the nose.
Commenting on the appearance of the Guide, published far away in Cambridge on the other side of the country by an unknown author, his son later marvelled that "It was hardly possible that a work of this description...could have made its appearance under circumstances of greater disadvantage." The title was an added hindrance at first, since the third edition of the official city guide, now titled The New Bath Guide or useful pocket companion, had been published in 1765, the year before Anstey's work. Though it provided a useful point of reference to readers, repeated editions of the pocket companion, 'corrected and much enlarged', continued to sow confusion for as long as the two books continued to appear.
The Guide relates the misadventures of the three naïve children of a Northern squire, as reported by them over the course of fifteen letters to friends and parents, and incidentally give a comic picture of life in the spa. In a far departure from the Augustan manner common until then, the style is colloquial and written in loose anapaestic tetrameters, later to be characterised as the "Anstey measure" or "Bath-guide verse".
The inventiveness of the rhymes and the puns on the ridiculous names given to the characters adds further humour here.
Such naming, an aspect of the work which was widely admired, derives from theatrical practice at the time and gives a clue to the person's character, but in the case of the main protagonists there is added irony too. Their Blunderhead surname not only sums up the various meanings of the word 'blunder' in their behaviour but has the overtones of stupidity contained in the colloquial 'dunderhead' as well. This is further emphasised in the son's first name, Simkin, which is a dialect expression denoting a simpleton. The behaviour of his sister Prudence, on the other hand, is at variance with her name. She most imprudently allows herself to be seduced by a Methodist imposter with the expressive name of Roger, the slang meaning of which is sexual intercourse, while in dialect it refers to a tricky person.
The broad 18th century humour of the Guide inevitably met with criticism in some quarters. While the parodies and allusions to Milton, Dryden and the Classical authors were well received, the perversion of Methodist terminology in Prudence's account of her seduction at least caused controversy. To dispel some of this, the second edition contained an epilogue which added considerably to the book's length but light-heartedly tried to meet some of the objections. Nevertheless, a comment at the start of the more prudish 19th century concerning "those violations of decency which disgust us in the New Bath Guide" indicates that they were not forgotten.
When Anstey returned to a burlesque of Bath society a decade later in An Electoral Ball, it allowed him to embroider on some of his earlier themes. Thus Simkin's shocked account of female hairdressing in "Letter XII" of the Guide was expanded to outright farce in An Election Ball and had an immediate effect. In Samuel Hoare's conversation piece portrait of him (see above), his daughter is shown trying to draw his attention to the extravagant doll in her hand, in reality the kind of lay figure sent from Paris to guide dressmakers in the latest styles. Though she seems to distract him from composition, she is also serving as muse, for the doll's fantastic hairstyle is just such as, judging from the pattern of lines on his manuscript, Anstey went on to describe in the poem: "To a cap like a bat / (Which was once my cravat) / Part gracefully patted and pinn'd is, / Part stuck upon gauze/ Resembles mackaws/ And all the fine birds of the Indies."
It was this episode too, featuring Madge Inkle as she confects a hair ornament from the purloined tail feathers of the rooster, that Anstey's friend Coplestone Warre Bampfylde chose as the first scene to illustrate in An Election Ball. Arriving too late for inclusion in the revised edition of 1776, they were first used instead in the Latin epistle that Anstey addressed to Bampfylde, including mention of all the scenes the artist had chosen to picture.