The original basic design and cost (which I sent you in July) did not include the sample-holder. But as I am proposing to simplify considerably the design of the large parts, the sample-holder, which is small but somewhat complicated, could, I think, be included under the original estimate (Fr. 200,000). On the other hand it might be better to have made here (by Paul) the monochromator support and slit system, which would enable me to set up the monochromator and use it for other things while waiting for the special sample-holder to be made in London. What do you think? Of course, if I find that both can be included under the original estimate I should ask for both from Paul.