Items D1/2-D1/51 were bundled together and marked "Notes up to 1927" by Sraffa. In most cases this date is our only evident terminus ante quem. Sraffa's own file titles are given in inverted commas
Items D1/54-90 were bundled together and marked "Notes 1928-31" by Sraffa although some items predate this. Items D1/54-68 formed a sub-bundle
Items D1/70-89 relate principally to the "circus" of economists who discussed Keynes' Treatise on Money
For notes used for the research for Production of Commodities by means of commodities see D3/12
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Kirkaldy. Apologises for the letter sent the previous day
Groningen. Discusses Mr Gordon and his advisers, ceremonials of the Dutch, subject of previous letter (undisclosed), request to be addressed without clerical titles "for I am a downright layman"