He married Mary Lees of Kelso, Scotland in 1924, and was involved in the 1924–25 Wembley British Empire Exhibition, perhaps helping H. C. Smart organise the Australian pavilion.
In June 1922 designs were invited for a proposed monument to diggers who fought in Egypt; a statue to be erected at Port Said at the head of the Suez Canal.
[9] The sculptor Web Gilbert, who created the first of the AWM dioramas, died suddenly on 3 October 1925 while working on the full-size model for the Port Said memorial.
[10] Gilbert had another commission in train, a large bronze bas relief memorial to John Dias,[11] former secretary of the Carpenters' Union.
Bowles completed that work[12][13] and took on several diorama projects: His submission for the 1926 Henry Lawson Memorial design competition was judged second to that of G. W.
[22] Progress on Lambert's statuary group had not stalled — cast in bronze in England, it was installed in The Domain, Sydney, and unveiled on 28 July 1931.
Bowles designed decorative bronze window panels for the Queensland Commonwealth Bank Building in Queen Street, Brisbane (built 1927–1930) with his work depicting the trinity images of Industry, Agriculture and Commerce.