Mr. Sharma learned counsel appearing for the respondents raised the following contentions before us: (1) that the appellants never pleaded any oral family arrangement; (2) that the family arrangement relied upon by the appellants was not bona fide and was fraudulent as the on sent of respondents 4 & 5 was obtained by fraud or` undue influence; (3) that the appellants themselves gave a complete go bye to the family arrangement in the case which they made out before the Revenue Courts and have merely taken advantage of a stray observation made by the Deputy Director of Consolidation; (4) that the petition filed before the Naib Tahsildar embodied and as such the terms and conditions of the compromise was compulsorily registrable under the Registration Act, and being unregistered it was inadmissible in evidence; (5) that at any rate the family arrangement was not proved by the appellants as a fact; 208 (6) that the doctrine of estoppel would not apply because the family arrangement being compulsorily registrable there can be no estoppel against the statute; and (7) that the findings of the Revenue Courts being essentially findings of fact, this Court would not interfere, unless there was a sufficient error of law apparent on the face of the record.