TRIBULATIONS OF THE 'WIGWAM.'-The committee having in charge the erection of the 'Wigwam' for the accommodation of the August Convention, concluded that the Skating Park of Dr. Jansen, situated at the corner of Broad and Wallace streets, would be a delightful spot whereon to build their monstrous house. So they sought out those whom they supposed were duly authorized to lease the ground, and after striking a satisfactory bargain, proceeded at once with their work. Yesterday morning the first spade of dirt was thrown, and the first piece of timber hacked into the proper dimensions. An enthusiastic crowd of men and boys had gathered about the spot to witness the operations, and for a time everything went lovely. But later in the day, affairs took a new and entirely unexpected turn. This was caused by the appearance upon the scene of Lieutenant Lovaire, backed up by a posse of fifteen policemen. The Lieutenant forthwith ordered the laborers to drop their hatchets and shovels. As the men had a wholesome dread of the uniformed gentry accompanying the Lieutenant, the hatchets and shovels were dropped accordingly. The reason for this unceremonious meddling with the work on the part of the authorities then transpired, and caused no little comment in certain circles. It appears that the Doctor had graciously suffered a base-ball club to make use of his grounds during the season when the ice is too thin for skating. The gentlemen who have assumed the task of constructing the 'Wigwam' very innocently imagined that the matter would be all right if they arranged it satisfactorily with the base-ball boys. It was so arranged. But it further appears that the Doctor did not approve of the arrangement thus made, and for this reason he called upon the police authorities for a force sufficient to protect his property from the depredations of the 'Wigwam' people. There is no probability that the work upon this institution will be resumed at Dr. Jansen's Skating Park. The Doctor has personally assured us that the 'Wigwam' will not, shall not, and is not going to be erected, at the corner of Broad and Wallace streets at least-not if he can help it. Some other locality will, therefore, have to be fixed upon by the committee. If, in doing so, they neglect, as in the first instance, to procure the proper authorization from the proprietor, the Convention when it assembles may find itself without a local habitation.