"6 March 1847 Mary Rooney sailed for America deeply regretted by Pat Anderson."
The above quote was taken from the article by Peter Mulvany titled "Extracts from a Ratoath Diary 1804-1898." It was published in Vol. VI, No. 1 (1975) of Riocht na Midhe, the journal of the Meath Archaeological and Historical Society.
Here are a few more excerpts.
May 1848. The Magranes and Tom Bryant went to America and on 3 August the Lynams.
25 July 1848. Martial law proclaimed in Ratoath.
May 1849. James McCabe, John Bruton, and several others went to America and Pat Magrane on 6 June.
June 1849. Mary left Ramsey a broken heart.
Aug. 1849. Kit Foy died of cholera.
The article mentions many other deaths, emigrations, legal matters and other events. This article shows one of the reasons I love Irish genealogical periodicals: they contain information that is not readily available anywhere else. They also provide insight into the social history of Ireland.
To see if there is a journal published for your Irish locations of interest, follow this link, Archaeological and Historical Journals.
I have inquired about the present location of the original diary that the excerpts are taken from, but I haven't yet located it. I hope to find the diary, or at least a complete transcription of it someday. If you have any information about the diary, please let me know.