"As you know the Estate has been giving protracted and serious consideration to Jack Pitt's proposal to add an edited version of Russell's notes as an appendix to Human Knowledge. I have today heard that this proposal has been approved so it only remains for me to obtain the necessary clearance from McMaster based on the terms of our contract with you. ...It was also felt that the new printing of Human Knowledge which is imminent would, in terms of sales at least, benefit considerably from the addition of Pitt's material."