The following is an index to property transfer deeds recorded at the Suffolk County Deed Registry from the original land purchase until conversion of the building into condominiums. Mortgages, trust agreements, and other similar recorded documents are not included. This index is intended as a guide only; actual deeds should be reviewed for details.
| Transfers of Land and Buildings | ||||
| Date of Deed | Grantor | Grantee | Book | Page |
| 21Dec1993 | Robert G. Segel, trustee of 21-23 Marlborough Street Realty Trust | 21-23 Marlborough Street Condominium | 18754 | 27 |
| 12Apr1993 | Macmillan, Inc. (21-23 Marlborough) | Robert G. Segel, trustee of 21-23 Marlborough Street Realty Trust | 18157 | 306 |
| 29Jun1989 | William F. Reilly, Beverly C. Chell, and Eleanor P. Vreeland, trustees, Katharine Gibbs Realty Trust (21-23 Marlborough) | Macmillan, Inc. | 15684 | 67 |
| 23Aug1956 | Katharine Gibbs School, Inc. (21-23 Marlborough) | Gordon Gibbs, Blanche L. Gibbs, and Edward L. Kane, trustees, Katharine Gibbs Realty Trust | 7208 | 376 |
| 03Sep1946 | James Gordon Gibbs, Mary M. Ryan, and Blanche L. Gubbs, trustees, Katharine Gibbs Realty Trust (confirmatory deed; 21-23 Marlborough) | Katharine Gibbs School, Inc. | 6338 | 80 |
| 03Sep1946 | James Gordon Gibbs, Mary M. Ryan, and Blanche L. Gubbs, trustees, Katharine Gibbs Realty Trust (21-23 Marlborough) | Katharine Gibbs School, Inc. | 6236 | 82 |
| 04Aug1936 | Institution for Savings in Roxbury and its Vicinity (21-23 Marlborough) | James Gordon Gibbs, Mary M. Ryan, and Blanche L. Gibbs, trustees, Katharine Gibbs Realty Trust | 5616 | 570 |
| 19Mar1936 | T. Morris Murray and Eleanor V. Murray, husband and wife (foreclosure deed; 21-23 Marlborough) | Institution for Savings in Roxbury and its Vicinity | 5589 | 285 |
| 16Aug1919 | Robert Winsor and Eleanor M. Winsor, his wife, in her own right (21-23 Marlborough) | Eleanor V. Murray, wife of T. Morris Murray | 4163 | 36 |
| 31May1905 | Arthur Little | Eleanor M. Winsor, wife of Robert Winsor | 3047 | 201 |
| 02May1904 | Charles Francis Adams, 2nd, trustee under the will of Harriet W. Phillips | Arthur Little | 2964 | 594 |
| 27Dec1876 (recorded 22Jan1877) | Francis H. Peabody | John C. Phillips | 1362 | 185 |
| 28Dec1876 | P. Adams Ames (foreclosure deed; mortgage to the Provident Institution for Savings in the Town of Boston, assigned to the New England Mutal Life Insurance Company) | Francis H. Peabody | 1359 | 84 |
| 19Nov1867 | Charles W. Freeland | P. Adams Ames | 912 | 49 |
| Transfers of Unimproved Land | ||||
| Date of Deed | Grantor | Grantee | Book | Page |
| 01Sep1865 | William R. Lawrence (lot with 100 foot frontage) | Charles W. Freeland | 865 | 17 |
| 08Jan1863 | Ebenezer Rockwood Hoar (lot with 27 foot frontage) | William R. Lawrence | 821 | 227 |
| 07Jan1863 | Theophilus Parsons (lot with 73 foot frontage) | William R. Lawrence | 821 | 210 |
| 06Nov1858 | George Goss (lot with 75 foot frontage) | Ebenezer R. Hoar | 747 | 19 |
| 06Nov1858 | George Goss (lot with 73 foot frontage) | Theophilus Parsons | 747 | 18 |
| 06Nov1858 | Commonwealth of Massachusetts (Lot with 421 foot frontage) | George Goss | 747 | 1 |