| 1988.0043.0001.02 | Potomac River Dory | Dory | Holden, H L - Creator | Circa 01/01/1989 - | Potomac River Dory plan showing hull lines and some sections of construction plan. Pencil on mylar. Drawn by Leavenworth Holden. | | | | open CBMM page |
| 1988.0043.0002.00 | Potomac River Dory | Dory | Holden, H L - Creator | Circa 01/01/1989 - | Potomac River Dory plan showing lines and some sections of construction plan. Blueline Copy. Drawn by Leavenworth Holden. (Original 88.43.1B). | | | Image 1 | open CBMM page |
| 1999.0020.0002.01 | Pride of Baltimore II Model | Not specified | Gillmer, Thomas C - Designer; Holden, H L - Creator | Exact 08/01/1987 - | Plans for a Pride of Baltimore II Model drawn by Leavenworth Holden of Horizon Design and Manufacturing Company. Drawings were developed from design by Thomas C. Gillmer. Drawings depict a black and white line drawing and a print of the Horizon model kit showing the main mast, rigging trestle, crosstrees, and foremast rigging. | 28.000in - 36.000in | | | open CBMM page |
| 1999.0020.0004.00 | Pungy Model | Pungy schooner | Earle, John G - Creator; Holden, H L - Creator | | Plans for an unidentified Pungy Model drawn by Leavenworth Holden with a detail drawing and text notes added by John G Earle. Drawing depicts the outboard profile with mast and rigging plan and deck plan. On the reverse side is a sheer, half-breadth and body plan. Scale is 1/3" = 1'. Material is pencil on paper. | 22.000in - 30.000in | | | open CBMM page |