TWO:But when Gregg looked up, rather sheepishly, wary of meeting the Doctor's eye, he beheld a sight that sent an uncomfortable thrill down his spine. For the latter lay at full length upon the couch, his chest and stomach rising and falling in the convulsions of that excessive[Pg 190] laughter that at first sight raises a doubt of danger in the mind of the beholder��for men have died of mirth. Gregg stared at his prostrate friend, and his own countenance was transfixed with alarm. Many minutes elapsed before any kind of definite sound brought a relief to the strain; for the Doctor's laugh was prim?val; it racked his vitals, shook him from head to foot, began and stopped, proceeded in a series of explosions, not unlike those of the Clockwork man himself, until at last it reached the throat and found expression."Is this the conservatory?" playfully whispered Miss Rothvelt; and if a hot, damp air, motionless, and heavy with the sleeping breath of countless growths could make it so, a conservatory it was. Every slightest turn had to be alertly chosen, and the tangle of branches and vines made going by the stars nearly impossible. The undergrowth crowded us into single file. We scarcely exchanged another word until our horses came abreast in the creek and stopped to drink. Conditions beyond were much the same until near the end of our d��tour, when my horse swerved abruptly and the buzz of a rattlesnake sounded almost under foot. The mare swerved, too, and hurried forward to my horse's side.