December 1933 – vol. 27, issue 7–212 SIRS,-- With reference to the suggestion t h a t the increase of Gannets on Grassholm (1922-1924) might have been due to birds from Ailsa Craig (antea, p. 151), I must point out t h a t there was also an increase on the latter island a t t h a t time. During the years 1922-1925 I spent a n annual fortnight on the island and always noted an increase. During 1924 in many places the Gannets had ouste... This article is only available to registered users.To read more, please log in or purchase a subscription.