A book sent here by Messrs Ganthier-Villars of Paris addressed to Prof Guillaume was refused in error yesterday. It was a not very thick book-packet. Prof Guillaume has arrived today & I enclose his written authority to deliver the book to us. Will you have the kindness to return it with any charge which the regulations impose.
I am, yours truly
Asst. Sec, Royal Socy [Assistant Secretary, Royal Society]'.