To Charles Babbage 26 May 
12 Upper Gower St
My dear Sir
I have called with this note to beg a favour of you. M. Sismondi, the historian & Madam Sismondi (my wife’s aunt) have just arrived in England and are coming together with Miss Allen to stay with us,1 would you, therefore, permit us to bring them to the parties, you have been kind enough to ask us to.
My sisters have left town, & therefore will be deprived of the pleasure of accepting your kind invitation to them.
With many thanks | Believe me | My dear Sir | Yours very truly | Charles Darwin
Asks if he can bring his guests, J. C. L. and Mme [Simonde de] Sismondi and [Fanny] Allen, to CB’s parties.