Rajasthan Tenancy Act, 1955–Sec. 88–Hindu Adoption & Maintenance Act, 1956–Secs. 6 & 11(vi)–Suit for declaration of khatedari rights–Dismissal of–Appellant failed to establish the fact of adoption of his father by original land holder–Mere opening of mutation cannot prove the fact of adoption-Interference declined in the findings of Single Judge & BOR.