The following is an index to property transfer deeds and party wall agreements 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 |
| 31Aug1990 | Mark J. Connaughton, trustee, 90 Marlborough Street Realty Trust | 90 Marlborough Street Condominium | 16472 | 181 |
| 08Sep1989 | Chamberlain School, Inc. | Mark J. Connaughton, trustee, 90 Marlborough Street Realty Trust | 15807 | 8 |
| 21Dec1966 | Chamberlain School, Inc. | Chamberlain School, Inc. | 8088 | 168 |
| 06Dec1954 | Baid Realty Corp. | Chamberlain School, Inc. | 7015 | 325 |
| 31Aug1953 | Katharine Gibbs School, Inc. | Baid Realty Corp. | 6895 | 433 |
| 03Sep1946 | James Gordon Gibbs, Mary M. Ryan, and Blanche L. Gibbs, trustees, Katharine Gibbs Realty Trust (confirmatory deed) | Katharine Gibbs School, Inc. | 6336 | 290 |
| 03Sep1946 | James Gordon Gibbs, Mary M. Ryan, and Blanche L. Gibbs, trustees, Katharine Gibbs Realty Trust | Katharine Gibbs School, Inc. | 6236 | 84 |
| 14Jan1931 | Katharine Gibbs School, Inc. | Katharine M. Gibbs, William H. Gibbs, and James Gordon Gibbs, trustees, Katharine Gibbs Realty Trust | 5241 | 169 |
| 12May1924 | I. Tucker Burr and Alice M. Burr, in her own right | Katharine Gibbs School, Inc. | 4572 | 581 |
| 15May1905 | Eben S. Draper | Alice M. Burr, wife of I. Tucker Burr | 3043 | 161 |
| 28Apr1896 | Oliver W. Peabody and William Minot, surviving executors under the will of Cornelia A. G. Winthrop | Eben S. Draper | 2355 | 603 |
| Transfers of Unimproved Land | ||||
| Date of Deed | Grantor | Grantee | Book | Page |
| 18May1871 | John H. Sturgis (lot with 24 foot frontage) | Cornelia A. G. Winthrop, wife of Robert C. Winthrop | 1050 | 49 |
| 18May1871 | Ann W. Davis (lot with 24 foot frontage) | Cornelia A. G. Winthrop, wife of Robert C. Winthrop | 1050 | 49 |
| 20Apr1870 | Ann W. Davis (lot with 12 foot frontage) | John H. Sturgis | 998 | 243 |
| 06Oct1865 | Henry Lee, Jr. (three-fourths undivided interest in lot with 60 foot frontage) | Ann W. Davis | 866 | 149 |
| 27Sep1865 | Frances E. A. Davis and Edward D. Sohier and Sewall Tappan, trustees under the will of Jonathan Amory Davis for the benefit of Frances Davis and Ann W. Davis (one-fourth undivided interest in lot with 220 foot frontage) | Ann W. Davis | 866 | 149 |
| 14Nov1863 | Commonwealth of Massachusetts (lot with 220 foot frontage) | Henry Lee, Jr. (three-fourths undivided interest) and J. Amory Davis (one-fourth undivided interest) | 860 | 39 |
| 13Mar1863 | David Snow (lot with 24 foot frontage) | John H. Sturgis | 831 | 27 |
| 30Jul1862 | Commonwealth of Massachusetts (lot with 24 foot frontage) | David Snow | 831 | 22 |
| Party Wall Agreements | ||||
| Date | Party One | Party Two | Book | Page |
| 14Jul1871 | Cornelia A. G. Winthrop, wife of Robert C. Winthrop (owner of lot at 90 Marlborough) | Ann W. Davis (owner of lot at 88 Marlborough) | 1063 | 7 |