| Index Entry | Harpsichords, made by Heyer, John Frederick |
| Location | New York |
| Citation | NYJ-N.767.224 17 Dec 1767:33 (1302) Harpsichords and spinnets, made and sold by John Frederick Heyer, opposite to Battoe-Street, in the Broad-Way. N.B. He repairs organs, harpsichords, and spinnets, and puts them in the best order. |
| Generic Title | New York Journal-New York |
| Date | 1767.12.17 |
| Publisher | Holt, John |
| City, State | New York, NY |
| Year | 1767 |
| Bibliography | B0028457 |