This was up in the holly tree a couple of weeks ago. I'd forgotten about it.
Unicum arbustum haud alit duos erithacos
(One bush does not shelter two Robins)
Zenodotus (3rd Century B.C.)
Have they hatched yet, can you see any caterpillars?
2013 photos & vids here
eff37 on Flickr
I'd better go and have a look. If there were caterpillars they wouldn't last long.
Nothing left...
Oh well, the birds must have had a feast!
Any idea what they might have become?
It's difficult to tell from the photo, so I'll ask the question: are you sure they were eggs and not baby spiders clumped together, as they do, with just a few bold individuals dotted about? It might also explain why they've dispersed.
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Nige Flickr
I didn't get that close. They might have been baby spiders, in which case the birds probably had them.
Nigel O is correct, these are the spiderlings of a garden spider.