Sayers and Brown Families

Please, I am looking for information and direction for and about my ancestors named SAYERS and BROWN from, I believe, County Tyrone. My 3rd great grandmother is Sarah Sayers, born Ireland 6 APR 1818, died Fall River, Massachusetts USA 10 APR 1910 - daughter of John and Jane. This transcribed article is all I know of her life in Ireland. It refers to her as Sayer (no S) but I have never seen her name listed as anything but SayerS - including her death certificate.  My third great-grandfather was John Brown, born Ireland 1810 and died Fall River, Massachusetts USA 1882 - son of Samuel and Agnes (nee Hastings). Samuel and Agnes also emigrated to Massachusetts c. 1837.  I would also be interested in hiring a researcher in or near Co. Tyrone - if anyone can make any recommendations I would be grateful. Thank you. 

"A most remarkable woman for her age is Mrs. John Brown, who if she lives until April 8, 1910 will reach her 92nd birthday.  Mrs. Brown is the daughter of John and Jane Sayer who resided in the north of Ireland near Londonderry. Mrs. Brown's maiden name was Miss Sarah Sayer and she was educated in the country school of the district where she lived until the age of 19.  When about the age of 20 she married in Ireland, John Brown, who belonged in the same part of the country.  Both then came to America.  They came direct to Fall River and took up their residence between Washington and Ferry Streets.  After residing there a number of years, Mr. and Mrs. Brown removed to Union Street until 14 years ago when she became too feeble bodily to live alone as she was then a widow, her husband having died 14 years previous.  She was the mother of 12 children, five of whom are living at the present time.  Since her health began to fail, she has resided with her different children and is now living with her daughter-in-law Mrs. John Brown, 75 Buffington Street, where she has been since a year ago last June.  Mrs. Brown, through her husband was actively engaged in church work, led a very quiet home life carinig for her children, who demanded all her attention.  Mrs. Brown is remarkably clear in her mind for such an old lady and is also a very pleasing conversationalist.  Her bodily strength being weak, Mrs. Brown is able only to go out when taken for a drive.  She is always delighted when anyone calls to see her, but she regrets greatly not being able to attend her church on Sundays."  The Fall River Evening Herald, November 11, 1910.