Mary T. Derosier

July 1, 1948February 24, 2019

Mary T. Derosier, 70, of Keene, NH passed away February 24, 2019 in Great Falls, Montana.

She was born in Keene, NH on July 1, 1948, the daughter of Theresa D. and Wilfred A Derosier, Sr.

Mary graduated from Vilas High School in Alstead, NH and later attended Elliot Community Hospital School of Nursing in Keene NH. She married and later divorced Richard A. Briggs of RI. She devoted many years of her life to her work as a Registered Nurse in both Rhode Island and New Hampshire. Mary is survived by her children, Richard E. Briggs of Langdon, NH, Linda Briggs Sertain of Montana; her partner, William Oren Sheldon of Walpole and their daughter, Mary Lou Sheldon Phaneuf of Keene; her brother, Wilfred A. Derosier, Jr. of TN; a sister, Ruth Fenton, of RI; and many grandchildren and great-grandchildren.

A graveside service will be held at the family lot in the Lower Cemetery in Langdon, NH where she will be laid to rest with her parents when the weather permits.


  • Graveside Service in the Spring

Mary T. Derosier

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Richard Briggs

March 12, 2019

To an amazing woman who taught me the value of religion, had work and determination. I could not have asked for a better mother and i am glad she was able to meet Abby, before her passing. She is in a better place now and has been reunited with her mother and father. psalm 23:4

Jean Balamuth

March 9, 2019

This woman taught me so much about raising childrens' SPIRITS! XO