Percival Leigh approaches the study of the English language through a distinctly comical lens, arguing that serious grammars have failed to reform the daily violations heard in the streets. The text systematically covers the four traditional divisions of grammar—orthography, etymology, syntax, and prosody—while subverting each section with absurd examples of slang, slipslop, and regional dialects. In orthography, the author presents wildly misspelled letters and bizarre vocabularies that expose the humorous extremes of the national mind. Etymology provides a classification of words derived from low trades, alcohol, and emotional excess, contrasting romantic ideals with the harsh vocabulary of the Stock Exchange.
Throughout the discussion on syntax and prosody, Leigh dissects the rules of concord, government, accent, and emphasis by mocking common errors, clumsy speech, and the overly dramatic utterances of fashionable society. The argument develops not through dry academic abstraction, but by holding up a mirror to the linguistic affectations of cabmen, quacks, and young lovers alike. Leigh gently hints that human speech is inherently flawed and wonderfully ridiculous, suggesting that an awareness of these linguistic vices is the first step toward true eloquence.