" In the case of Lewright v. Walls, 55 Tex. Civ. App. 643, 119 S.W. 721, the court, among other things, said: "To the validity of any sale of land for taxes, it is imperatively necessary that the land shall have been subject to taxation, that it shall have been actually assessed for taxation, and a land tax levied, and that, as to the official proceedings leading up to a sale, there should be at least prima facie evidence of * * * compliance with the provisions of law on the subject; and, as a general rule, it may be said that a party claiming land under a tax sale for taxes must show affirmatively that the law under which the sale was made has been substantially complied with, not only in the sale itself, but in all the anterior proceedings."