Your favour of the 22d. did not come to hand till yesterday afternoon. We are so fortunate with respect to the hooping cough, that it may be safely brought in the case of your little patient who may herself be benefitted by an Excursion. Mrs Madison and myself will, therefore, with much pleasure, receive the fulfilment of the promised visit from yourself and Mrs Dunglison, as soon as your conveniency will permit. May we look out for you at the close of the present or commencement of the next week? Meantime, accept, both of you, our joint salutation and good wishes.