Sister Celestine Larkin was, I have found, the first cousin of Father Edward Flanagan, and the daughter of an uncle, William Larkin and Catherine Grady.  He lived in Manhattan with his family and I found the address recently in some papers I had. James Larkin of Ballygalda was the father of the four Larkin brotters, who came to the U.S. in 1858 and were brothers of Edward Flanagan's mother, Honora Larkin.  Thomas Mulry was a cousin of Father Flanagan and the connection was, bellieve, through his paternal grandmother, Winifred Larkin, from Ballynakill in Galway.  i am trying to find the connection between this Winifred Larkin and James Larkin of Ballygalda.  Have a good time in Ireland; I was there last July(Ballymoe, Roscommon and Sligo) and gathered a lot of information very useful to me in doing the biography.  I  have easy access to the    U.S. Census lists, so I am building up my knowledge of Father Flanagan's relatives in New York when he arrived there in 1904. 

Lot of great information in your E-Mail which I shall study very carefully.  No, Sister Celestine was the first daughter of William and Mary (O'Grady)  Larkin, and was born in  1881.  SHe entered the Sisters of Charity when she was nineteen years old,in 1902 and spent her life as a beloved figure in St. Mary's School and at Grace Insitute. Her secular name was Mary, and she took her first vows as a religious on July  26, 1904, just before Edward Flanagan arrived from Ireland.  Her parents had two other daughters, the ones you named; Catherine and Ann. 

     There were two Thmas Mulry's, the son of Winifred was the father of Thomas Maurice Mulry, who was born in 1865.    The first Thomas Mulry married a lady named Parthenia, and had almost as many children as his son.  The son was a prominent Catholic laymen in the early 20th century, friend of the Arichbishops of New York, head of the St. VIncent de Paul Society and President of Catholic Charities.  I have sent for a biograhy of him by Thomas Meehan, and he is mentioned with great praise in a book published in 2003, "Critical Issues in Child Welfare" by Joan Shireman.  I am trying to find the link between his  grandmother, Winifred (Larkin) Mulry of Ballynakill in County Galway and Honora Larkin, Father Flanagan's mother.  Much of my information has come from the U.S. Census records of New York State in 1860, 1870, 18880, 1890 and 1900.  What makes the research confusing is that both father and son were named Thomas  The son's wife was named Mary and they lived at 120 Perry Street in New York.  I found a death notice of the son, Thomas Maurice Mulry, in the New York TImes dated May 6, 1910.  Also, Thomas Maurice Mulry had a son named Thomas who died recently.  That muddies the waters a little bit.

     Thank you for the Larkin list from Ballynakill.  The Winifred mentioned is the Winifred who came to the U.S. with her four children.  Your list is the first time I have come across Michael Larkin from Ballynakill.  This may be the llink to the Larkins in Ballyagalda, Roscommon, the family of Honora Larkin, mother of Father Flanagan.
She had a brother named  Michael, but it was a very common name for the Larkins.  The information you have given me is priceless for my research and I really appreciate it.  Thomas Maurice Mulry was deeply interested in child welfare, and it is possible that he had some influence on Edward Flanagan's interest in the same.
A lot of pieces of a great ancestry puzzle are coming together for me and I will be in touch with you after your trip to Ireland.