- A treatise on the art of decyphering, and of writing in cypher. With an harmonic alphabet.
- Useful hints to those who make the tour of France, in a series of letters written from that Kingdom by Philip Thickness, Esq. ... The second edition corrected.
- A year's journey through the Pais Bas; or, Austrian Netherlands. By Philip Thicknesse, Esq. Second edition, with considerable additions; and the routes through Germany, .. and Switzerland, ..
- A letter to Lady Audley, from Mr. Philip Thicknesse.
- The valetudinarians Bath guide. Or, the means of obtaining long life and health. ... By Philip Thicknesse.