378 THE LITERATURE OF THIS SUBJECT 



Swallows is extensive, and some of it is very curious. In order 

 that the reader may avail himself of all the sources of infor- 

 mation I possess, and form his own conclusions, I present him 

 with such portion of the bibliography of the subject as I happen 

 to have already compiled. Having at present writing only 

 about half finished my " Bibliography of Ornithology ", I sup- 

 pose there may be extant about twice as many articles on the 

 subject as are here given. Most of these titles relate merely to 

 irregularities observed in the ordinary migrations of Swallows 

 in England ; but there is a fair sprinkling of references to the 

 particular crucc of hibernation. The most wary or the most 

 timid student may be assured that he will find liimself in per- 

 fectly respectable company whichever side of the fence he may 

 fall on. The notes which I have appended in many cases sup- 

 port my assertions regarding the character of the evidence we 

 possess, and warrant my statement that the allegations, respect- 

 ing which ornithologists must sooner or later come to some 

 understanding, are well attested. For the rest, I may add, 

 that I will not ignore, do not deny, and can not vouch for the 

 statements of authors. 



1630. SCHWALBACH, J. G. " Disseitatio de Ciconiis, Gruibus, et Hirundinibus, 

 eoruruque Hybernaculis. Spirae, 1630. 4to. pp. 28." 

 Not seen— others quote the title differently. 



1658. Thomasius, J. Dissertatio de Hibernaculis Hiruadiuum. Thoma- 

 sius, J., prses. resp. Cbr. Scbmidicben. 4to. Lipsiaj, 1638 ; 1671 ; 

 1702, pp. 32. — Deutsche Uebers., Von der Schwalben Winterquartier. 

 8vo. Dresden, 1702. 

 Not seen — Bohm, Bibl. ii. i. p. 521. Title compiled from different sources. 



1666. SCHEFFERUS, J. ["That it is most certain, that Stvallows sink them- 

 selves towards Autumne into Lakes, no otherwise than Frogs ; " etc.] 

 < Philoa. Trans, i. 1660, p. 350. 



1702. GoEDiNG, A. " Diss. phil. brevem eshibens descriptionem Abitus 

 Domiciliiqiie hibernalis Hiruudinum ; Praes. And. Goeding, Kesp. E. 

 Aurelius, Dalek. Upsaliae, 1702. 8vo. pp. 4, 52." 

 Not seen — title taken from v. Friesen. 



1761. COLXiNSON, P. A Letter to the Honourable J. Th. Klein, Secret.iry to 

 the City of Dantzick, from Mr. Peter CoUinson, F. R. S. concerning 

 the Migration of Swallows. <^ Philos. Trans, for 1760, li. pt. ii. 1761, 

 pp. 4.^)9-464. 

 Refuting the notion of torpid hibernation. 



1764. ACHAKD, F. C. Remarks on Swallows on the Rhine. < Philos. 

 Trans, for 1763, liii. 1764, pp. 101, 102. 



Statement of their being found in holes in a eandy cliff; they " soomed stiff 

 and lifeless ", bat subsequently revived. 



