My History of Western Philosophy was nearly complete, and I wrote to W. W. Norton, who had been my American publisher, to ask if, in view of my difficult financial position, he would make an advance on it. He replied that because of his affection for John and Kate, and as a kindness to an old friend, he would advance five hundred dollars. I thought I could get more elsewhere, so I approached Simon and Schuster, who were unknown to me personally. They at once agreed to pay me two thousand dollars on the spot, and another thousand six months later. At this time John was at Harvard and Kate was at Radcliffe. I had been afraid that lack of funds might compel me to take them away, but thanks to Simon and Schuster, this proved unnecessary.
Source: The Autobiography of Bertrand Russell, v.2
More info.: https://russell-j.com/beginner/AB26-070.HTM