Jack Butler Yeats was the younger brother of poet W. B. Yeats. Although born in London in 1871, he spent formative childhood years with his grandparents in Sligo, a place that would remain central to his imagination. He began his artistic career as an illustrator, depicting scenes of Irish life before developing a powerful style of expressive painting. His work often featured travellers, horse races, sailors, landscapes, and ordinary people, combining close observation with movement, colour, and emotion. Over time, his paintings became increasingly expressive and personal, reflecting not just the visible world but also memory and feeling. Today, Jack B. Yeats is recognized as one of Ireland's most important painters.