of 29th August 1964, at approximately 15.30 hours GMT, my newly arrived assistant H. Miles was conveying his belongings from the boathouse to the observatory on Bardsey Island, Caernarvonshire. Halfway between the boathouse and Ty Pellaf, bis attention was attracted by a small, bright yellow, warbler-like bird which appeared suddenly and briefly atop a hedgerow at close range. Only very general im...

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