At the same time there are bad men in the landlord class as in any other, and from them the tenant required protection. By the Agricultural Holdings (England) Act of 1875, 38 & 39 Vict. c. 92, improvements for which compensation could be claimed by the tenant were divided into three classes. First class improvements, such as drainage of land, erection or enlargement of buildings, laying down of permanent pasture, &c., required the previous consent in writing of the landlord to entitle the tenant to compensation. Second class improvements, such as boning of land with undissolved bones, chalking, claying, liming, and marling the land, the latter now hardly ever practised, required notice in writing by the tenant to the landlord of his intention, and if notice to quit had been given or received, the consent in writing of the landlord was necessary. For third class improvements, such as the application to the land of purchased manure, and consumption on the holding by cattle, sheep, or pigs, of cake or other feeding stuff not produced on the holding, no consent or notice was required. Improvements in the first class were deemed to be exhausted in twenty years, in the second in seven, and in the third in two. It was the opinion of the Richmond Commission of 1879 that, notwithstanding the beneficial effects of this Act, no sufficient compensation for his unexhausted improvements was secured to the tenant. The landlord and tenant also might agree in writing that the Act should not apply to their contract of tenancy, so in 1883 when the Agricultural Holdings Act of that year (46 & 47 Vict. c. 61)[675] was passed, it was made compulsory as far as regarded compensation, and the time limit as regards the tenant's claims for improvements was abolished, the basis for compensation for all improvements recognized by the Act being laid down as 'the value of the improvement to an incoming tenant'. Improvements for which compensation could be claimed were again divided into three classes as before, but the drainage of land was placed in the second class instead of the first, and so only required notice to the landlord. This was the only improvement in the second class; the other improvements which had been in the second class in the Act of 1875 were now placed in the third, where no consent or notice was required.