Land-owning is, beyond all other callings, in the nature of a monopoly.
— ROBERT GIFFEN, Essays. in Finance, First Series, (1871), Chap. X., p. 239.
The nature of landed property, invariably limited, whatever may be the demand of the producers or consumers, gives it the power of a monopoly.
— SISMONDI, Essay on Landed Property, Political Economy (English Edition of 1847), p. 176.