four hundred and fifty pounds sterling per annum, for five years, shall be repaid to the said lessees by the proprietors, through some drainage or land improvement company, at the term of Martinmas yearly, provided always that the said improvements shall have been executed by the said lessees before the previous said first day of September in each year, and shall, previous to said payment, have been inspected and passed by the Government inspector, and shall have in every respect been executed in the way pointed out by the proprietors or their factor; or, in the event of their having failed to point out the improvements required at least ten months before the said first September, then it shall be sufficient if the lessees have executed them in the way they deem best; upon which advances the lessees shall pay halfyearly, at the terms of Whitsunday and Martinmas, during the continuance of this lease, the whole of the rent-charge payable in respect of said advance by such drainage or other company, at such rate as the said company may charge upon a twenty-five years' loan, but not to exceed six pounds fourteen shillings per cent. per annum; and the lessees shall also pay the poor-rates and road-money, if any, exigible from the landlord in respect of said rent-charge; and it is also provided and declared that, in the event of the said lessees failing regularly to pay the said rent-charge and the said annual rent, and allowing the same to remain unpaid for more than ten days after the terms at which the said payments thereof respectively become due in any year, then, and in that event, it shall be in the option of the proprietors, or their foresaids, to put an end to and terminate this lease, and the same shall <ipso facto> become null and void. ................................................ <Fourth>: That the lessees 'shall labour, cultivate, and manure such parts of the subjects hereby let as are brought or to be brought under cultivation, according to the rules of good husbandry, and shall follow a six course shift or rotation, and leave the same in that state, but with reference to rule 6 of the rules with sub-tenant annexed hereto. <Fifth>. That the lessees are bound to offer to the present tenants sub-leases of such portion of the lands hereby let as may be laid off to accompany their houses, and may, during the first six years of the lease, sublet to others any farms so laid off, and which the present tenants may refuse to take and during the remaining six years any sub-tenancy becoming vacant can only be sublet with the consent, in writing, of the proprietors or their agent; but such sub-leases can only be entered into on observing the conditions rules, and regulations for that purpose annexed, and subscribed by the contracting parties as relative hereto, to which special reference is made, and which shall be held to be as binding on both parties as if the same were incorporated herein.