Between February and April 1890 Van Gogh suffered a severe relapse. Depressed and unable to bring himself to write, he was still able to paint and draw a little during this time, and he later wrote to Theo that he had made a few small canvases "from memory ... reminisces of the North". Among these was Two Peasant Women Digging in a Snow-Covered Field at Sunset. Hulsker believes that this small group of paintings formed the nucleus of many drawings and study sheets depicting landscapes and figures that Van Gogh worked on during this time. He comments that this short period was the only time that Van Gogh's illness had a significant effect on his work. Van Gogh asked his mother and his brother to send him drawings and rough work he had done in the early 1880s so he could work on new paintings from his old sketches. Belonging to this period is Sorrowing Old Man ("At Eternity's Gate"), a colour study Hulsker describes as "another unmistakable remembrance of times long past". His late paintings show an artist at the height of his abilities, according to the art critic Robert Hughes, "longing for concision and grace".
Van Dyke left high school in 1944, his senior year, intending to join the United States Army Air Forces for pilot training during World War II. Denied enlistment several times for being underweight, he was eventually accepted for service as a radio announcer before transferring to the Special Services and entertaining troops in the continental United States. He received his high school diploma in 2004 at the age of 78.