We publish here four letters between Luigi Einaudi and John M. Keynes of the period March-April 1922 and related to Einaudi’s contribution to the Manchester Guardian Supplements. Einaudi was one of the Italians invited to contribute to The Reconstruction in Europe, together with, among others, Benedetto Croce, Amedeo Giannini, Luigi Luzzatti, Francesco Saverio Nitti, and the young Piero Sraffa.