Any holder of two or more such instruments of mortgage may surrender them to the Municipal Corporation of the City of Bombay, and such Corporation shall accept the same, and shall (on receipt for each such instrument of such fee as the said Corporation may from time to time prescribe) grant to such holder, under the seal of the said Corporation, an instrument of mortgage in which the consideration stated shall be the aggregated amount of the considerations respectively state in the instrument so surrendered.
     Every instrument so granted may be in the from in the schedule hereto annexed or to the like effect.