40. NMC83020 Drawing 1. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Basement floor plan. 1912
41. NMC83021 Drawing 2. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Ground floor plan. 1912
42. NMC83022 Drawing 3. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Mezzanine floor plan. 1912
43. NMC83023 Drawing 4. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - First floor plan. 1912
44. NMC83024 Drawing 5. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Second floor plan, 3rd, 4th & 5th floors similar. 1912
45. NMC83025 Drawing 6. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Sixth floor plan, 7th & 8th floors similar without balconies. 1912
46. NMC83026 Drawing 7. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - 9th floor plan. [1912]
47. NMC83027 Drawing 8. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Roof plan. 1912
48. NMC83028 Drawing 9. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Sparks St. Elevation. 1912
49. NMC83029 Drawing 10. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Metcalfe St. Elevation. 1912
50. NMC83030 Drawing 11. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Cross Section on line A-A. 1912
51. NMC83031 Drawing 12. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Cross section B-B. 1912
52. NMC83032 Drawing 13. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Steel column schedule. Blackburn building. 1912
53. NMC83033 Drawing 14. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Riser sheet. 1912
54. NMC83142 Drawing 15. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - Basement temporary piping plan for Building NO. 2 1912
55. NMC83143 Drawing 16. Plans for office building, cor. Sparks & Metcalfe Sts., Ottawa, for Messrs. Blackburn Bros. - [cross section showing risers] 1912
56. NMC83144 Sparks Street elevation 1912
57. NMC83145 [Ground floor showing main hall, cross section of stairway] [1912]
58. NMC83146 [Cross section of stairway] [1912]
59. NMC83147 Detail of main entrance hall. West elevation. 1913
60. NMC83148 Detail of main entrance hall. East elevation. 1913
61. NMC83149 Detail of main entrance hall. Ground floor plan of main hall. Rear elevation of hall [1912]