A will not in accordance with the testator’s natural affection and moral duties. Williams, Ex’rs, (7th Ed.) 38; Stein v. Wilzinski, 4 Redf. Sur. (N. Y.) 450; In re Willford’s Will (N. J.) 51 Atl. 502. But particularly, in the civil law, a will which deprives the heirs of that portion of the estate to which the law entitles them, and of which they cannot legally be disinherited. Mackeld. Rom. Law, jj 714; Civ. Code La. 1900, art. 3556, subd. 16.