Following the publication of the abstract of J. I. Thornycroft's paper on the 'Most Suitable Propeller for Shallow Draught.' read at the 1885 meeting of the Institution of Naval Architects this detailed description of the boat in question (length, 56 ft. 8 in.; beam, 7 ft. 8 in.), built by Messrs. Thornycroft and Co., to the order of Messrs. Allen, Anderson, and Co., of Alexandria, for the use of the directors of the Societe d'Irrigation dans le Behera appeared in the 10th of April number of Engineering,