SIRS,--With reference t o the note under t h e above heading (antea,p. 177), i t may be of interest t o record t h a t nests of t h e Swallow without any ledge or other support below are b y no means unusual in South Gloucestershire. Of 37 nests which remain, more or less intact, in my farm buildings, 16 are shallow structures resting on ledges or horizontal rafters, and n are comparatively deep s...

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