Spent some more time digging this evening, and I found the following obituary, which says Caswell House was an orphanage:
“DAUGHTER OF SQUIRE OF PENLLERGAER DEATH OF MISS DILLWYN LLEWELYN of the late Sir DAUGHTER Lady Llewelyn, and for many years an active figure in several Swansea charities, Miss a Gwendoline Harriet Dillwyn-Llewelyn died at Llandrindod Wells. She had been unwell for a short period. She was aged 80. Miss Dillwyn-Llewelyn had lived for the past two years at Grove Lodge, Llandrindod Wells. Formerly she resided in Bryn-road, Swansea.
Her passing means the loss to many Swansea charitable organisations of a true friend, whose life had been devoted to good deeds. Miss Dillwyn-Llewelyn was a sister of Sir Charles L. D. Venables Llewelyn Lord Lieutenant of Radnorshire. CASWELL ORPHANAGE.
Fore a death number of her of years mother prior in 10 1917, Miss Dillwyn-Llewelyn conducted an orphanage at Caswell Bay, and on the death of her mother she returned to Penllergaer until her father's death in 1927, after which she resided at No. 10, Bryn-road Swansea, until about two years ago, when she removed to Llandrindod Wells. Miss Dillwyn Llewelyn was very great friend of Miss Frances Havergall, the famous hymn writer, who died while on a visit Miss, Llewelyn at Caswell Bay. A tablet subscribed for by friends of the hymn writer recording the fact is affixed to the wall the house on the Caswell Road.
AID FOR SICK.
Work for the sick and suffering occupied much of Miss Llewelyn's time. She was for many years chairman the South Wales Nursing Institute. Brunswick-place, and she maintained the of close interest Swansea in Hospital which parents "her had had before her. For years she was an active member of the Hospital Samaritan Committee. and took a particular interest in I the work of the Eye Hospital Many organisations, such as the Y.M.C.A..
Y.W.C.A., and charitable institutions had her interest. Her own needs were simple and her charitable gifts and subscriptions were She Was a devoted Church. woman, and attended at St. Gabriel's Church before leaving Swansea. At Penllergaer she was, or course, interested in the village church of St. David's, which built by her grandfather which her father, opening Sir John, service was of present as infant. In 1937, to mark the centenary, there was an extension to the church and Miss Dillwyn Llewelyn was one of principal subscribers to the extension fund. SCHOOL PRESENTATION ted Llangyfelach School Some years ago she present the gold key given to her father on occasion of the opening of the school, and also with a painting, by Evan Walters showing Llangyfelach Church and the surrounding fields on the hill looking up from Bryntywod. The arrangements for the funeral are in the hands of Messrs. D.”
Herald of Wales - Saturday, 8 January 1944
https://www.newspapers.com/newspage/965815818/ 