Contemporary specimens of compositions, accompanied by explanatory or supplementary letters by the authors themselves, describing their methods, habits of writing, revisions, etc. cf. Pref
A muck manual for farmers : a treatise on the physical and chemical properties of soils; the chemistry of manures; including also the subjects of composts, artificial manures and irrigation
Standard up-to-date practical letter writer : a comprehensive and practical guide to correspondence, showing the structure, composition, formalities and uses of the various kinds of letters, notes and cards