A testator left his real estate to trustees upon the following trusts:—”In trust to hold the same unto them and their successors the trustees for the time being of this my will for ever. And to receive and accumulate for the period of twenty years after my death the rents and profits thereof and then to pay the same to the clergyman of St. Kilian’s Church for the time being and thereafter to pay annually to the clergyman of St. Kilian’s aforesaid the income of my said real estate provided that such clergyman as aforesaid be a secular priest such accumulations and income to be applied to religious and useful purposes as such clergyman may determine in connection with St. Kilian’s Church aforesaid. If however there shall be no secular priest in charge of St. Kilian’s Church aforesaid at any time when the said accumulations of income or the annual income shall be payable then I direct that my said trustees shall pay and apply such accumulations of income and the annual income to and for the benefit of St. Kilian’s Church and the congregation thereof in such manner and form as my said trustees may consider advisable.”