Margaret Thomas was the first cousin to Elizabeth Thomas who married Peter Reid's brother Thomas Reid. 
   Probate: 
 REID Margaret of Thornhill Chorley Lancashire, widow died 
 20 February 1911. Probate London 30 March to Alister 
 Reid and Peter Reid bleachers. Effects £893 12s. 4d.     
 Marriage source kindly provided by Heather Doane (rurrly) via Ancestry message who is a descendant of Margaret's sister, Emily Thomas: 
 Ancestry.com. Ireland, Select Marriages, 1619-1898 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2014 
 FHL Film Number: 101406  
 Reference ID: 387   
 Buried: St John The Evangelist Churchyard, Pendlebury, Grave ref 637-638 
 Find a grave: 
https://www.findagrave.com/memorial/260645847/margaret-reid    Possible Birth certificate refs: 
 Margaret Thomas 
 Birth XX 596 Manchester, Q1 Jan,Feb,Mar 1839 
       XX 629 Manchester, Q1 Jan,Feb,Mar 1839