How deeply are our destinies influenced by the most trifling causes! Had the unknown builder who erected and owned these new villas contented himself by simply building each within its own grounds, it is probable that these three small groups of people would have remained hardly conscious of each other's existence, and that there would have been no opportunity for that action and reaction which is here set forth. But there was a common link to bind them together. To single himself out from all other Norwood builders the landlord had devised and laid out a common lawn tennis ground, which stretched behind the houses with taut-stretched net, green close-cropped sward, and widespread whitewashed lines. Hither in search of that hard exercise which is as necessary as air or food to the English temperament, came young Hay Denver when released from the toil of the City; hither, too, came Dr. Walker and his two fair daughters, Clara and Ida, and hither also, champions of the lawn, came the short-skirted, muscular widow and her athletic nephew. Ere the summer was gone they knew each other in this quiet nook as they might not have done after years of a stiffer and more formal acquaintance. And especially to the Admiral and the Doctor were this closer intimacy and companionship of value. Each had a void in his life, as every man must have who with unexhausted strength steps out of the great race, but each by his society might help to fill up that of his neighbor. It is true that they had not much in common, but that is sometimes an aid rather than a bar to friendship. Each had been an enthusiast in his profession, and had retained all his interest in it. The Doctor still read from cover to cover his Lancet and his Medical Journal, attended all professional gatherings, worked himself into an alternate state of exaltation and depression over the results of the election of officers, and reserved for himself a den of his own, in which before rows of little round bottles full of glycerine, Canadian balsam, and staining agents, he still cut sections with a microtome, and peeped through his long, brass, old-fashioned microscope at the arcana of nature. With his typical face, clean shaven on lip and chin, with a firm mouth, a strong jaw, a steady eye, and two little white fluffs of whiskers, he could never be taken for anything but what he was, a high-class British medical consultant of the age of fifty, or perhaps just a year or two older.