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May 21, 1890Mother Mary Baptist MacDonnell and Sister Mary Stanislaus Harrington, Teresa Casey, Bernard Foley, Gabriel Romera, and Rose Fitzsimons left Australia to return to Argentina
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May 23, 1830Pope Gregory XVI granted special Indulgence to Catherine and her companions
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May 23, 1850Foundation to Cobh from St Maries of the Isle, Cork - M Josephine McCarthy
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May 24, 1911Opening of Junior Boys' Boarding School, Galong, New South Wales - M Claver Moore
May 24, 1860Foundation to Skibbereen from Kinsale Co Cork - M Philomena Maher
May 24, 1883Foundation to Dunmore East from Clonakitty - M Columba Marmion (sister of Dom Columba OSB)
May 24, 1857Foundation to Dundee, Scotland from Derry - M Catherine Locke
May 26, 1887Sisters of Mercy in Sacramento, California became an independent congregation
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May 27, 1940Maghull Community, Liverpool founded from Broughton Hall, Liverpool.
May 27, 1903Foundation to Aranmore from St Brigid's, Western Australia
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May 29, 1871Death of Sister M. Stanislaus Droguet, early member of the Wellington foundation
May 29, 1897Opening of Waitara Founding Home, Sydney - M Aloysius Casey
May 29, 1854Foundation to Ennis from Limerick - M Vincent McMahon
May 30, 1825Fr Nugent, Catherine's friend and adviser, died of typhus; nursed by Catherine, buried at Kells.
May 31, 1885Foundation to Newcastle-upon-Tyne from Liverpool - Sr Ligouri Gibson.
May 31, 1942Opening of hospital, Cootamundra, New South Wales
May 31, 1853Foundation to Castlebar, Co Mayo
May 31, 1844Death of M Aloysius Scott, Foundress of Birr
June 01, 1875Foundation to Rathangan, Co Kildare from Alton Towers, Shrewsbury, England - M Magdalen Monaghan
June 02, 1974Sisters of Mercy Wellington missionary endeavours begin with Sister Monica Quigg working in Fiji.
June 02, 1858Foundation to Enniscorthy from Wexford - M Teresa Kelly
June 03, 1861Skipton Convent, Yorkshire founded from Liverpool, Lancashire.
June 03, 1842Foundation to Newfoundland from Baggot St - M Frances Creedon
June 04, 1876Foundation to Burlington, Vermont