From the Reise der österreichischen Fregatte Novara [...] Zoologischer Theil, A. Pelzeln, "Vögel":

"Among the numerous specimens, some old and some young, brought back by the Novara expedition, there is also one killed by Mr v. Frauenfeld, which is characterised by its unusual size. Its dimensions are: length 2' 6" 6", wings 21", beak to the corner of the mouth 9" 7"", tail 13", while on another young specimen from Chile the wings are only 18 ¾", the beak to the corner of the mouth 2" 2" and the tail measures 10" (p. 7)