Section 28 but the same is not to exceed 2 years rent, after burdens, etc. deducted.

Provided always, that the sum or sums of money laid out by any one heir of entail, in the building a mansion-house or offices, or in the repairing or adding to the mansion-houses or offices, shall not, in any case whatever, be effectual to constitute a claim against the succeeding heir of entail for more than two years rent of the said entailed estate, after deduction of all publick burdens, life rents, and interests of debts, which may affect the said estate, as the same shall happen to be at the first term of Whitsunday after the death of the heir who expended the money claimed.