65 drawings: (1-4) first competition, 1829; (5) study for the third competition, 1835; (6-64) plans, elevations, sections of design for the whole library and north wing, and details of the north wing construction and furnishings, c.1836; (65) perspective of the proposed south front with portico; and (1a-f) 6 letters to John Willis Clark from M.M. Cockerell, widow of Frederick Pepys Cockerell, and J.E. Goodchild, clerk in C.R. Cockerell's office (1884), arranging to show drawings for the University Library and Fitzwilliam Museum.
 43 drawings, 1836-40: (1-5) a set of plans for the whole library; (6-43) plans, elevations, sections and details of the north wing, and many copies of contract plans.
 45 drawings, c.1837: (44-88) plans, elevations, and sections and details of the north wing.
 67 drawings: c.1829-39: (1) M.R. James, Fitzwilliam Museum, to H.G. Aldis, University Library, 26 March 1907, presenting drawings, sent c.1900 by Mrs. Cockerell to J.W. Clark; (2-4) plan, drawing of Old Schools east facade (possibly a pre-Cockerell drawing), and perspectives of the existing library; (6-12) plans, elevations and sections for the first competition, 1829; (13-16) second design, plans, aerial perspective, and sections for the first competition; (17-19) variant scheme, c.1829-30; (20-31) plans, elevations, sections and perspective for the second competition, 1830; (32-33) plans, c.1831; (34-38) various plans and elevations, c.1835; (39-43) plans, elevations and perspective for the third competition, 1835-36; (44-59) plans, elevations and sections for the whole library, c.1837; and (60-68) elevations and details for the north wing, 1837-39.