The Grace (cryptid victim) reference article from the English Wikipedia on 24-Jul-2004
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Grace (cryptid victim)

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Grace (uncertain - September 27, 1722) was an Irish woman. She was known to have been a victim from a Dobhar-chu; a dangerous cryptozoological animal.

Her tomb tells her final hours:

On September 27, 1722, a woman named Grace was killed by a Dobhar-chu, while washing clothes in Glenade Lake. When her husband came to find her, he found instead a Dobhar-chu sitting on her bloody clothes and mutilated body. He killed the beast, stabbing it in the heart. As it died, it made a noise like a whistle. It's supposed mate rose from the water and chased the man and his friend. They killed it before it got the chance to hurt either man.