Barry is believed to have been exempted from military service during the First World War for medical reasons but was drafted to do agricultural work.
[1] In Jersey Barry knew the artists Edmund Blampied, who was also an etcher, and Sir Francis Cook, who left his paintings to the Island in its own gallery.
[4] He produced portraits of Joan Collins, Margot Fonteyn, and the artist Misomé Peile, as well as many paintings of voluptuous nudes.
[1] Barry developed a Pointillist style, made famous in the late 19th century by Georges Seurat, and applied bright contrasting oil colours to create forms and shades, or used large flat blocks of a few complementary colours to create shapes and contrasts on large canvasses.
They had three children: a son, Rupert Rodney Francis Tress Barry (1910–1977) who became the 4th Baronet, and two daughters, Kathleen (1909–1994) and Sheila (1915–2004).
[2] Barry also had a long affair in the 1950s with Doreen Durrell, the wife of a doctor in Jersey, whom he drew and painted in portrait many times.