Concerning the concert, I have made inquiries of those in a position to know, and, taking the lowest average, it seems to me you can rely on taking at least one hundred Louis d’or, as I am told that even a tolerably well-attended concert produces that amount, and you can reckon on the presence of the Court, which usually sends twenty Louis d’or to artists of high standing. The time when you ought to give your concert coincides with our Art Exhibition, when Berlin is fullest; it would be the first grand concert of the year, and they say that receipts amounting to one hundred Louis d’or may be expected, and even guaranteed. The cost of the large hall of the theatre is forty Louis d’or, all included (bills, porterage, etc.). The room in the Sing-Akademie is little more than half that sum, but it seems that the Court does not care to go there. The concert-room of the theatre ranks highest, and is considered the most aristocratic; so, at any rate, it would be more advisable for you to take that. All agree on that point. If you deduct forty Louis d’or from the total receipts, there remain, say, sixty Louis d’or. There is no doubt that this is amply sufficient to cover the expenses of posting from Hamburg to Berlin and back, and of making a fortnight’s stay with your whole family at the hotel here; and I would not enter into so much detail had not Neukomm mentioned yesterday that when he told you he estimated the net receipts at sixty Friedrich d’or, you thought there would be a risk in undertaking the journey. Let me show you, then, that two post-horses, including fee to post-boy, make one thaler per German mile; so the journey there and back, a distance of thirty-nine miles, and a night’s quarters, would come to a little more than one hundred thalers. How you could manage to spend the balance, namely, two hundred thalers, in a fortnight, I cannot see, unless you organized a popular _fête_ on a small scale; that, however, probably not forming part of your programme, and your hotel expenses certainly not amounting to more than eight to ten thalers per day, your outlay would surely be covered. According to my estimate, you would have a surplus. To be sure, I admit, unforeseen circumstances might interfere with my calculations; but on the other hand the receipts may be far greater than I have assumed, and at any rate I, for one, have no doubt that your travelling and hotel expenses will be amply covered.