Ephraim Chambers's Cyclopaedia (1728) and the Tradition of Commonplaces

In the fifth volume (1755) of the Encyclopédie in his entry on “En-cyclopædia,” Denis Diderot forecast a time in which the sheer number of books would require a division of intellectual labor. Some people, he said, will not do much rea ding but rather “devote themselves to investigation which will be new, or which they will believe to be new.” The majority, unable to produce anything of their own, “will be busy night and day leafing through these books, taking out of them the fragments they consider worthy of being collected and preserved.” ¹ Although Diderot set this prospect in the future, he believed the signs were already visible and offered his encyclo-pædia as a response. Part of this image, however—the selection of passages from a range of authors—was already a familiar one. Re commended by the Ancients, it was widely practised during the Renaissance by the educated elite who kept commonplace books for recording quotations on various themes from Classical authors. Even the epigram from Horace on the title page of the Encyclop édie suggests this lineage: “What grace may be added to commonplace matters by the power of order and connection.” ²

In the classical period, the Latin term, locus communis, referred to a general argument capable of being used in different situations. In his Institutiones Oratoriae Quintilian discussed the notion of copia verborum in connection with the ability of a good orator to produce copious illustrations and embellishments from particular ideas. Renaissance writers thought this facility was enhanced by a record of similar ideas in the same place in a notebook. This practice had been followed in the medieval period, but it became more systematically taugh t as part of rhetoric from the sixteenth century. Commenting on this, R. R. Bolgar wrote:

The whole purpose of the Humanists in transmogrifying Greek and Latin literature into a series of notes was to produce a body of material which could be easily retained and repeated. They made titanic efforts to remember the contents of the note-books the y compiled. ³

Quintilian’s work, and more immediately, that of the German humanist, Rudolph Agricola, influenced Erasmus in his De Copia, first published in 1512 as De Duplici Copia Verborum ac Rerum Commentarii Duo. This offered advice on how to collect words and passages under various topoi or loci (places) as a means of storing extracts from books that could later be brought together and embellished in either writing or conversation. The set of ideas or themes grouped under one “Head” wer e known as “common-places,” and the notebooks kept for this purpose were commonplace books. ⁴ These were also called “copie” books in the sense of collections enabling copia, or free flow of material for oratory. Versions of this practice continued into the nineteenth century: figures such as John Milton, George Berkeley, Robert Southey, R obert Burns, and David Thoreau kept commonplace books, some of which were subsequently published. Some of these included less than elevated content: Kenneth Lockridge has uncovered a string of misogynist remarks and anecdotes in the commonplace book of Th omas Jefferson. ⁵

In the only major study of the commonplace tradition, Sister Joan Marie Lechner analyzed its status in Renaissance rhetorical training from the sixteenth to the early seventeenth century, identifying some confusion and tensions, partly as result of dissatisfaction with the “doctrine of places” taught by classical writers, and also because “commonplace” had come to refer both to a “locus or seat of arguments” and a “speech-within-a-speech.” ⁶ Her work shows that commonplace books were kept as aids to recall reading and as storehouses (thesauri) of topics and phrases suitable for speeches and conversation, as recommended by Erasmus and other writers. However, Lechner noted a new need pa rtly satisfied by the commonplace collections, which was that they accommodated Renaissance passions for “accumulating universal knowledge.” Thus, in her words:

The commonplace book with its encyclopaedic array of topics or places was thought of as a compend of knowledge displayed in a systematic pattern...