WHEN one is looking for a house, one's choice is guided in the first instance by external and aesthetic considerations. One wants it, if possible, to look nice, to have pleasant surroundings and good views, and at least to have enough rooms and windows and not too many stairs. But when (if ever) one is satisfied with these things, there remains the important question of whether the house is really sound and well made, and here Mr. Towndrow-who will be remembered for his afternoon talks on architecture earlier in the year—will give some useful expert advice.