I will have the honor to receive you, as well as Madame de Brillon, with the greatest enthusiasm on the day that you have indicated. I regret being unable to give this lady all the satisfaction she desires, as my harmonica is not set up and cannot be before that time.

I will be flattered if I can put you in a position to recognize the substance and usefulness of my discovery, and if I can give you some proof of the deep respect which with I am, Your Excellence, your very humble and obedient servant