SIR, Although very grateful for Christopher Brown’s genial review of the Vereniging Rembrandt celebrations in your February issue (pp.125–26), I am afraid one point in his text ought to be rectified because the Vereniging would otherwise receive rather more praise than it deserves. The 1931 Lozenge composition with two lines by Mondrian was not bought for the Stedelijk Museum, Amsterdam, in the year it was painted, nor did the Vereniging have anything to do with its being given to the city of Hilversum at the time. It was a group of friends of contemporary art who bought it for 500 guilders to be placed in the new Hilversum Town Hall, from where the as yet unloved object was then lent to the Stedelijk Museum in 1951. In the course of a conflict with the Dutch government, Hilversum decided to sell the Mondrian in 1987, and it was only in the aftermath of the ensuing row that the city of Amsterdam, the Vereniging Rembrandt, the Algemene Loterij and the Prins Bernhard Cultuurfonds provided the Stedelijk Museum with the 2.5 million guilders needed to retain it. Although the Vereniging supported the third Van Gogh to enter a Dutch public art collection in 1918, it only opened up to further modern and contemporary  art in the 1950s, and its board would certainly have had no sympathy with a Mondrian in 1931.