Richard Sayers was considered to be the most precise and most compre- hensible lecturer at LSE. In the Spring of 1949 he received a letter that said in effect:

Sayers was meticulous in responding to any approach by a student. He asked me to see the author of the note. I met with Bill, discussed his model, suggested some changes in his flows, and arranged for him to meet with Ralph Turvey. By then, examinations were near and Bill had to spend the rest of the term working on his sociology.

At the end of term, two people, in particular, were enthusiastic regarding the design: Walter Newlyn and Bill's landlord (the Mr Langley, a former employee of the metropolitan Water Board with a well-equipped work shed in his garage, referred to in Bill's acknowledgement at the beginning of chapter 10). Walter Newlyn guaranteed an overdraft to allow Bill to purchase the components for his machine (Mark I). Mr and Mrs Langley offered him free room and board for the summer, one cinema visit with them and one packet of cigarettes per week (Bill must have had other resources to satisfy his nicotine needs).