Wikipedia, engl.
https://en.wikipedia.org/wiki/Patrick_Neill_%28naturalist%29
Dictionary of National Biography 40 (1894), S. 178-179
http://www.archive.org/stream/dictionaryofnati40stepuoft#page/178
https://en.wikisource.org/wiki/Neill,_Patrick_%281776-1851%29_%28DNB00%29
Desmond, Ray: Dictionary of british and irish botantists and horticulturalists. London 1994, S. 513
https://books.google.com/books?id=thmPzIltAV8C&pg=PA513
Parks & Gardens UK page
http://www.parksandgardens.org/places-and-people/person/983