One reason for this insincere quality may have been the fact that the very foundations of our neighborhood were artificial. Laura Matilda Street was “made ground.” The land, not yet quite reclaimed, was continually struggling with its old enemy. We had not been long in our new home before we found an older tenant, not yet wholly divested of his rights, who sometimes showed himself in clammy perspiration on the basement walls, whose damp breath chilled our dining-room, and in the night struck a mortal chilliness through the house. There were no patent fastenings that could keep him out,--no writ of unlawful detainer that could eject him. In the winter his presence was quite palpable; he sapped the roots of the trees, he gurgled under the kitchen floor, he wrought an unwholesome greenness on the side of the veranda. In summer he became invisible, but still exercised a familiar influence over the locality. He planted little stitches in the small of the back, sought out old aches and weak joints, and sportively punched the tenants of the Swiss Cottage under the ribs. He inveigled little children to play with him, but his plays generally ended in scarlet fever, diphtheria, whooping-cough, and measles. He sometimes followed strong men about until they sickened suddenly and took to their beds. But he kept the green-plants in good order, and was very fond of verdure, bestowing it even upon lath and plaster and soulless stone. He was generally invisible, as I have said; but some time after I had moved, I saw him one morning from the hill stretching his gray wings over the valley, like some fabulous vampire, who had spent the night sucking the wholesome juices of the sleepers below, and was sluggish from the effects of his repast. It was then that I recognized him as Malaria, and knew his abode to be the dread Valley of the shadow of Miasma,--miscalled the Happy Valley!