Complex sentence: In 1942 Heybroek held a critically acclaimed exhibition at the Gummeson Gallery in Stockholm, selling circa 60 works, oil paintings, gouaches and drawings, his expressionistic style at this stage was strongly redolent of Van Gogh.
Split into simpler sentences: In 1942 Heybroek held a critically acclaimed exhibition at the Gummeson Gallery in Stockholm, selling circa 60 works, oil paintings, gouaches and drawings. His expressionistic style at this stage was strongly redolent of Van Gogh.