Photographs (20" x 16"): top of Washington Monument Photographs (4" x 6.5"): capstone [2 items] Photographs (matted, 22" x 26"): Thomas Lincoln Casey (1831-1896) Photographs (11" x 25.5"): upper half of Washington Monument [2 items] Sketches and prints (26.5" x 21"): print of proposed Washington Monument Sketches and prints (33" x 27"): details of Washington Monument, sketch for Dougherty from (? Mills), October 24 Sketches and prints (16" x 12.25"): foundation, side and top view for Dougherty from Mills (notes added by ? Casey), July Sketches and prints (7.5" x 11"): print of proposed Washington Monument (printed signature of Casey) Sketches and prints (24" x 18.5"): proposed completion of Washington Monument, print with other structures for comparison Sketches and prints (16" x 24.5"): boundary of plummet, graph notes by Casey, February Sketches and prints (35.5" x 23.5"): elastic deflection of Washington Monument, printed graph (signed by Casey and Green), June 1 Sketches and prints (36.5" x 23.5"): pyramidion, printed graph/ sketch by Green (signed by Casey), January 19 Sketches and prints (35.5" x 23.5"): pyramidion, printed graph/ sketch by Green (signed by Casey), February 1 Sketches and prints (36.5" x 23.5"): pyramidion, printed graph/ sketch by Green (signed by Casey), July 21 Sketches and prints (print, 24" x 18"): setting of capstone Sketches and prints (23" x 18"): oscillation graph; includes 1889 notes in pencil from unknown source Sketches and prints (23" x 18"): extreme oscillation graph Sketches and prints (16" x 16"): foundation, plan of extension (signed by Casey) Sketches and prints (22" x 28"): foundation, plan of thickness of sandy stratum (signed by Casey) Sketches and prints (38.5" x 26.5"): foundation and shaft, print of design for strengthening (prepared by Davis with printed signature of Casey) Sketches and prints (17.5" x 44"): foundation, soffit graph, notes in pencil, July Sketches and prints (29" x 28"): buttresses, printed plan (signed by Casey) Sketches and prints (17" x 17"): plummet, graph, February 12 Sketches and prints (20" x 16"): plummet, graph, February 15 Sketches and prints (25" x 23"): plummet graph, August 27 Publication: [Devotional Book of Days] Publication: Second Primary Reader Publication: Wedding Ring Mortgage assigned to Frederick William Pierce (1895-1951) Receipt re: funeral of Antoinette Louise Pierce (1863-1937) Papers of Robert Mills Reports [4 items] Estimates [4 items] Expenditures [3 items] Contracts [3 items] Machinery complications [1 item] Correspondence Correspondence [6 items] Correspondence, (December) [5 items] Correspondence [8 items] Correspondence; includes poem about the monument [13 items] Notes Letters, drafts, and memoranda [4 items] Foundation: calculations, sketches, soil and clay [3 items] Foundation: calculations and rough sketches [8 items] Marble and stone: drafts, calculations, and rough sketches [11items] Marble and stone: drafts, calculations, rough sketches, September [4 items] Obelisk: calculations and rough sketches, August [3 items] Roof and height: calculations and rough sketches [3 items] Roof and height: calculations, rough sketches, diary, and marble pyramdidion, November [3 items]