Threlkeld, in 1726, produced the first attempt at an enumeration of Irish Algae and in 1802 William Tighe published his "Marine plants observed at the County of Wexford," it included 58 marine and 2 freshwater species. In 1804 Wade published Plantae Rariores in Hibernia Inventae, in which 51 species of marine and 4 species of freshwater algae were enumerated. In the north of Ireland John Templeton and William Thompson were at work publishing on the algae of Ireland.