NOTES AND QUERIES. 75 
I again got a clutch of two eggs of the exact same type, and also 
slightly malformed. Both clutches I still have, which to my mind 
proves them to be the product of the one bird. Speaking to one of 
the St. Kilda men about a specially fine Puffin’s egg, he told me that 
this same type of egg (and only one egg) was laid each year in the 
same burrow. I could give many other instances, but do not wish to 
trespass any further on your space. —T. THornron Macxkerru (The 
Hall, Caldwell, Renfrewshire). 
Some Ornithological Notes from Mayo and Sligo.—This has been 
the first season since 1898 that Motacilla alba has not been observed 
visiting the Island of Bartragh on their spring journey to the 
northern breeding haunts. However, I have no doubt but that they 
did pay their usual visit to rest and feed, though sometimes, as they 
remain only a few hours, it is possible that during their short stay 
they escaped the notice of Captain Kirkwood and his man, who 
always keep a good look-out for these birds during the migration 
time, the end of April and beginning of May. When they visit 
the island they are always to be met with on and about a marshy 
pasture near the shore situate between the garden and the sand- 
hills, sometimes in the garden and a field close by, but their favourite 
haunt is the marshy pasture. If northerly or north-easterly winds 
prevail at the time of their visits their stay is prolonged for a day or 
two until the wind moderates. The birds generally appear in little 
flocks of four or five individuals, on different dates, and leave 
and are replaced by others. In the season of 1898 there were 
four separate arrivals and departures, one pair of the last party of 
visitors remaining until the end of May, and the late Mr. A. C. Kirk- 
wood, expecting and hoping they would remain to nest, was much 
disappointed by their leaving the island as the others did. In 1906 
there were four arrivals on separate dates. Captain Kirkwood 
observed two birds on May Ist, but they remained only a few hours. 
On the 5th six appeared, out of which he obtained a pair for me. 
This little flock disappeared next day, but was replaced by four birds 
on the 9th, and were joined by another bird on the 10th, when I had 
the pleasure of seeing and watching them for nearly an hour as they 
ran about and fed on the marshy flat adjoining the Rabbit-burrow. 
This lot also left that evening or next morning; but afterwards a few 
other birds were observed by Captain Kirkwood on the 12th and 
13th, the last visitors for the season. No large flocks have ever 
been noticed, and the unusual number of fifteen has been only once 
observed by the late Mr. A. C. Kirkwood, on May 12th, 1898. Our 
