From the result of inquiries, which the Directors have caused to be made, into the system of Scotch railways, it is the intention of the Board to use animal power exclusively until the line is finished half way to Drogheda; and even when finished to Drogheda, it is intended that all the goods will be carried by horse power, and in the intermediate hours, when no steam train shall start for Drogheda; that a horse train shall run from Dublin to Malahide, and another from Malahide to Dublin, as this division of the line must be supplied with extra means for its own peculiar traffic, which will not be required on the rest of the line.
Report to the Proprietors of the Dublin and Drogheda Railway in The Railway Magazine; and Annals of Science No XXVI April 1838
Irish waterways history 