The responses to my call for payment of the first instalment due from subscribers to the book-fund have come in very satisfactorily. Nevertheless a considerable number have not yet paid, perhaps because the issue of December 10, in which I called for the money, received abominable treatment from the post-office, and may consequently have failed to reach many subscribers. I wish that all who have not already responded would send me at once one-half the amount of their subscription (or the whole, if they prefer to finish the matter with one remittance). I hope to issue the book by February 15, if subscribers are prompt in their payments.