Hello Anne,
I have the book of memorial inscriptions for St Michael's Church, Trefeglwys (produced by the Montgomeryshire Genealogical Society). Here is a transcript of the gravestone...
"In the midst of life we are in death"
Sacred to the memory of Elizabeth, wife of Thomas Hughes of Lower Bwlchyllyn in this parish, who departed this life 4th November 1867 aged 43 years.
Also of David Tudor, son of the said Thomas and Elizabeth Hughes, who died 4th May 1860 aged 15 months.
Therese.