For two months or more after this incident Ward was less confined than usual to his laboratory. He exhibited a curious interest in the weather, and made odd inquiries about the date of the spring thawing of the ground. One night late in March he left the house after midnight, and did not return till almost morning, when his mother, being wakeful, heard a rumbling motor draw up to the carriage entrance. Muffled oaths could be distinguished, and Mrs. Ward, rising and going to the window, saw four dark figures removing a long, heavy box from a truck at Charles's direction and carrying it within by the side door. She heard laboured breathing and ponderous footfalls on the stairs, and finally a dull thumping in the attic; after which the footfalls descended again, and the four men reappeared outside and drove off in their truck.