Architectural plan, ink line drawing on tracing paper, of the first floor of Main Library (now level 3 of Duhig Building). Title block has: job title of Alterations and Additions to Main Library; Interior architect J.P. Birrell; no job number; and undated.

Architectural plan, ink line drawing on tracing paper, of the ground floor of Main Library (now level 2 of Duhig Building). Title block has: job title of Alterations and Additions to Main Library; Interior architect J.P. Birrell; no job number; and undated.

Architectural plan, ink line drawing on tracing paper. Drawing for lower ground floor with electrical details and furniture number, with pencil annotations. No title block, no job/drawing number, no date.

Architectural plan, ink line drawing on tracing paper. Title block: Alterations and additions to Main Library, 1st & 5th floors; University Architect is J.P. Birrell; job number is A2/46A; dated Aug 1965. It includes deletions and additions to flirst floor and additions to fifth floor.

Architectural plan, ink line drawing on tracing paper. Title block: Alterations and additions to Main Library, University Architect is J.P. Birrell, job number is A2, dated Nov 1965.

Architectural plan, ink line drawing on tracing paper, with toilet locations in relation to stairwells for Main Library. No title block, no title, no job number and undated.

Architectural plan, ink line drawing on tracing paper, for the existing lower ground floor of Main Library (now level 1 of Duhig Building). Title block has: job title of Alterations and Additions to Main Library; Interior architect J.P. Birrell; no job number; and undated.

Architectural plan, ink line drawing on tracing paper. Title block: Building is Main Library, University Architect is J.P. Birrell, job number is A2/47, dated Sep 1965.