Copy letter book containing manuscript copies of documents and correspondence pertaining of the Extension. Mostly copies of correspondence between Alfred Waterhouse and College officers concerning the new building, including schedules of accommodation (pp.1-25), and the progress of legislation for reforming the College. correspondence relating to the Owens College Extension Act (pp. 101-125),amalgamation with RMSM ( pp.142-48); proposed department of geology and mining (pp. 149-152), arrangement for transfer of responsibility of Trustees to Governors of Owens College, pp. 169-181. (includes inserts).