The Novel of the White Powder

In Arthur Machen's chilling tale, young Helen Leicester grows increasingly worried about her brother Francis, who becomes reclusive and immersed in his studies. After finally agreeing to see a doctor, Francis is prescribed a mysterious white powder that initially improves his condition, but its effects soon take a sinister turn, leading to unsettling and bizarre behavior. Originally part of Machen's collection "The Three Imposters," this standalone story captures the essence of his classic horror.