my website will be at the top of the list,
but if you type Megalithic Ireland, it comes fourth,
after two impoverished Wikipedia entries and a very limited
and patchy semi-commercial site.
If you type Prehistoric Ireland
neither this site nor mine is even on the first page,
and if you type Prehistoric Monuments [of/in] Ireland,
his site is on the first page while mine is not.
If you type Irish Prehistoric Sites
both are on the first page...
These observations may not seem too important;
they do no more than point out that, in searching Google,
a lot depends on what you type -
but also, it seems, a lot depends on Google...