"Hello, Thanks for your suggestion. By chance I have stumbled on a photo that seems to add weight to my theory (see my comment added to the post).
Andrew"
"In support of my theory that IIMT = “Illtid Isabella Mary Thomas”, I have by chance come across a photograph of Illtid Thomas' father with the inscription "Mr. T. E. Thomas 1854 by Mr. and Mrs. Itlid (sic) Thomas". (It is mis-catalogued on the V&A…"
An 1850s album in West Glamorgan Archives (D/D Vi 3/51) belonged to Swansea landowner Illtid Thomas and and was probably put together by himself and his first wife Isabella Mary. As well as photographs by well-known Swansea photographers John…