In 1851, the Census of Ireland Commissioners recorded 24 failures of the potato crop going back to 1728, of varying severity. In 1739, the crop was "entirely destroyed", and again in 1740. In 1770, the crop largely failed again. In 1800, there was another "general" failure, and in 1807, 50% of the crop was lost. In 1821 and 1822, the potato crop failed completely in Munster and Connaught, and 1830 and 1831 were years of failure in Mayo, Donegal, and Galway. In 1832, 1833, 1834 and 1836, a large number of districts suffered serious loss, and in 1835, the potato failed in Ulster. 1836 and 1837 brought "extensive" failures throughout Ireland, and again in 1839 failure was universal throughout the country; both 1841 and 1844 potato crop failure was widespread. According to Woodham-Smith, "the unreliability of the potato crop was an accepted fact in Ireland."