In 1903, Cambier exhibited at the Triennial Salon of Beaux Arts in
Brussels with pictures of a
Brabançon innkeeper, a colourful Bazaar, a large tableau of the Cid and the Leper, and a study in pastels of
Salome. ,
Newark, New Jersey, while it was under construction. (Recent investigation shows that delays in construction resulted in the 214 stained glass windows not being completed until 1950, by when they had been redesigned by Franz Zettler.) Cambier returned to Belgium in 1909, where he painted further portraits and extended his painting to landscapes. In 1914 he held an exhibition of his works at
Blankenberge, Belgium, where he was almost trapped when Germany invaded Belgium at the start of the First World War, and which resulted in the loss of many of his canvasses. He then spent 19 years intermittently in the
United Kingdom (1914–1933), and in 1915 and 1916 he donated some of his works for auction on behalf of the British Red Cross, reaching prices comparable with the best English painters. In 1923 he became a member of the
North British Academy of Arts, and became a resident guest of Sir Henry and Lady Barber at Culham Court, near Henley,
Oxfordshire. During this time, he painted numerous portraits of Lady Barber (1869–1932), and pictures of the interior of Culham Court and the surrounding countryside. ==Posthumous fame==