She loved it, nursed it, and ran her business at long range for some six months. But then she brought nurse and child to the hotel with her, placed them in the cool, airy nursery in the garden, and varied her busy day with still hours by herself--the baby in her arms. Back they came together before supper, and found unbroken joy and peace in the quiet of home; but always in the background was the current of Ross' unspoken disapproval. Three years, four years. There were three babies now; Diantha was a splendid woman of thirty, handsome and strong, pre-eminently successful--and yet, there were times when she found it in her heart to envy the most ordinary people who loved and quarreled and made up in the little outlying ranch houses along the road; they had nothing between them, at least. Meantime in the friendly opportunities of Orchardina society, added to by the unexampled possibilities of Las Casas (and they did not scorn this hotel nor Diantha's position in it), the three older Miss Wardens had married. Two of them preferred “the good old way,” but one tried the “d. s.” and the “c. f. d.” and liked them well. Dora amazed and displeased her family, as soon as she was of age, by frankly going over to Diantha's side and learning bookkeeping. She became an excellent accountant and bade fair to become an expert manager soon. Ross had prospered in his work. It may be that the element of dissatisfaction in his married life spurred him on, while the unusual opportunities of his ranch allowed free effort. He had always held that the “non-transmissability of acquired traits” was not established by any number of curtailed mice or crop-eared rats. “A mutilation is not an acquired trait,” he protested. “An acquired trait is one gained by exercise; it modifies the whole organism. It must have an effect on the race. We expect the sons of a line of soldiers to inherit their fathers' courage--perhaps his habit of obedience--but not his wooden leg.” To establish his views he selected from a fine family of guinea-pigs two pair; set the one, Pair A, in conditions of ordinary guinea-pig bliss, and subjected the other, Pair B, to a course of discipline. They were trained to run. They, and their descendants after them, pair following on pair; first with slow-turning wheels as in squirrel cages, the wheel inexorably going, machine-driven, and the luckless little gluttons having to move on, for gradually increasing periods of time, at gradually increasing speeds. Pair A and their progeny were sheltered and fed, but the rod was spared; Pair B were as the guests at “Muldoon's”--they had to exercise. With scientific patience and ingenuity, he devised mechanical surroundings which made them jump increasing spaces, which made them run always a little faster and a little farther; and he kept a record as carefully as if these little sheds were racing stables for a king.