Marlow Moss (1889-1958), his friend and reciprocal influence.
The recent Rome exhibition L'armonia perfetta included three of Moss's paintings, including White, black, red and grey, shown right.
Mondrian was a significant influence on Moss and many believe that she influenced him by introducing the double line.
Moss lived with Netty Nijhoff at Chateau d'Evreux, Gauciel in Normandy from 1937, but they fled to Holland and then to England in 1940. The Chateau was taken over by the French air force and in 1944 was destroyed in a bombing raid, along with most of Moss's life work and two Mondrians, lent to Moss by Wim and Tonia Stieltjes.
The literature available on Moss includes a book on the reconstruction of her works by Florette Djikstra, and a PhD thesis by Lucy Howarth, available from the British Library.