Once again my thanks Shane. John Leahy Esq was David Leahy's father, the corn merchants were his grandsons. I'm particularly interested in learning more about David as he may have been the author of 'A Review of the Principal Facts Connected with the Rise, Progress, Conclusion, and Character of Recent State Prosecutions in Ireland: including an examination of the most important of the decisions and opinions of the judges in both countries, and of the judgment of the house of lords.'
It was published anonymously, 'a barrister', and has been attributed to a David Leahy.
It's a long shot, but the world gets smaller and smaller with the wonders of the internet!
Cheers.
Janet