Letters of Marx and Engels, 1849
Source: MECW Volume 38, p. 218;
Written: 30 November 1849;
First published: in Marx and Engels, Works, First Russian Edition, 1934.
In view of the inimical relations now obtaining between the two societies to which we belong — in view of your direct attacks upon the refugee committee here,  at any rate upon my friends and colleagues in the same — we must break off social relations if we are not mutually to expose ourselves to equivocal interpretations. Yesterday evening I thought it unseemly, in the presence of my wife, to express my views on this collision.
While expressing my utmost obligation to you for your medical assistance, I would beg you to send me your account.
Dr K. Marx