140 A GEOGRAPHICAL BIBLIOGR.\PHY [Herts. 



1902. Grossman, A. F. Aves. [In Victoria Hist, of Co. of Herts., I.] 



4to, Lond. : 1902. [156.] 

 1902-12. Bickerton, W. Notes on Birds observed in Herts during 1901 

 to 1911, II pts. {Tr. Herts. N. H. Soc, 1902-12.) [65.] 



1903. Steele-EUiott, J. Purple Heron in Herts. (Zool.) 



1904. Bickerton, W. A Review of Herts. Ornithology. {Tr. Herts. 



N. H.Soc, XII., pt. I.) 



1905. Hartert, E. An enormous Increase in Number of Wood-Pigeons 



near Tring in Autumn of 1905. {Bull. B.O.C.) 

 WesteU, W. P. Hooded Crow at St. Albans. {Zool.) 



1906. Westell, W. P. Lesser Spotted Woodpecker and Whinchat in 



Herts. {Zool.) 



1907. Malcolmson, V. A. Little Owl nesting in Herts. {Field, July 20.) 

 Steele- Elliott, J. Girl Bunting in Herts. {Zool.) 



1909. Oldham, G. Sclavonian Grebe and Black-necked Grebe in Herts. 



{Brit. Birds, II.) 

 Lydekker, R. Birds [in Cambridge County Geographies : 



Hertfordshire, pp. 45-47.] Camb. Univ. Press : 1909. 

 Rothschild, Hon. W. Unusual Birds in Herts. {Brit. Birds, II.) 



1909-10. Witherby, H. F. Irruption of Crossbills. {Op. cit., III.) 



[partim.] 



1910. Lydekker, R. Little Auks near Harpenden. {Field, Dec. 3.) 

 Talbot-Ponsonby, C. G. Little Owls in Herts. {Brit. Birds, III.) 



1912. Bedford, Duchess of. Grey Wagtail breeding in Herts. {Op. 



cit., VI.) 

 Bickerton, W. Aves [of St. Albans and its Neighbourhood]. 

 {Tr. Herts. N. H. Soc, XIV., pp. 240-43.) [65.] 



1 913. Bedford, Duchess of. Chiff chaff wintering in Herts. {Brit. Birds, 



VI.) 

 Oldham, C. Rednecked Grebe in Herts. {T.c.) Common 

 Scoters in summer in Herts. {Op. cit., VII.) 



1913-18. Bickerton, W. Notes on Birds observed in Herts, during 1911- 

 16. 6 pts. {Tr. Herts. N. H. Soc, XV., pp. 49-63, 155-68, 

 209-24 ; XVI., pp. 9-3107, 141-56 ; XVII., pp. 35-46.) 



1915. Hartert, E. Early nesting of Reed-Warbler in Herts. {Brit. 



Birds, IX.) 

 Oldham, C. Black Redstart in Herts. {T.c) 



1916. Ellison, A. Robins building in spruces at Watton. {Op. cit., X.) 

 Hartert, E. Early nest of Reed-Warbler with Cuckoo's egg in 



Herts ; Late nesting of Reed Warblers. {T.c) 

 Oldham, C. A day with the Birds in N.W. Herts. {Tr. Herts. 



N. H. Soc, XV., pp. 51-2.) 

 Rowan, W. Dipper in Herts. {Brit. Birds, X.) 

 Smith, J. B. Lesser Redpolls breeding in Herts. {T.c) 



