How can I get the info on a few auctions that took place years ago?

I have a couple of coins which I purchased from a large collection and want to know if there is any auction records which I could attribute to these coins.
The first is an English AR unit.


The second is an Irish Halfpenny

The first is an English AR unit.


The second is an Irish Halfpenny


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Comments
Is either piece ludicrously rare? If not they are unlikely to have been illustrated in any sale prior to 10-15 years ago as the grades don't appear to be too high. The cost of illustration has dropped to a fraction of its former value with the advent of digital media. Prior to this you would only get important collections or specific high value lots illustrated.
This is where tickets are a bonus, as they frequently yield details of prior ownership.
I give away money. I collect money.
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