On March 26 you wrote asking to put off the correction of your proof until the beginning of May. As it is now the end of June the Secretaries have instructed me to write and press for the corrected proof. Pray let us have it back as soon as possible, The printers have been pressing for us of the type & our publication is delayed for want of it.
Asst. Sec. R.S. [Assistant Secretary, Royal Society]'.