The circus tent was nearly ready for the regular performance. Kit and Dan regarded the sawdust arena with the interest which it always inspires in boys of sixteen. Already it was invested with fascination for them. Two acrobats who performed what is called the "brothers\' act" were rehearsing. They were placarded as the Vincenti brothers, though one was a French Canadian and the other an Irishman, and there was no relationship between them. At the time the boys entered, one had climbed upon the other\'s shoulders, and was standing erect with folded arms. This was, of course, easy, but the next act was more difficult. By a quick movement he lowered his head, and grasping the uplifted hands of the lower acrobat, raised his feet and poised himself aloft, with his feet up in the air, sustained by the muscular arms of his associate.