| Edition | As printed | Type | Chars | Location | vs. previous |
|---|
| 2nd ed. (1778–83) | ① FERGUS | article | 71 | vol. 4, p. 2984 | |
| 3rd ed. (1797) | ② FERGUS | article | 71 | vol. 7, p. 213 | |
| 4th ed. (1810) | ③ FERGUS | article | 71 | vol. 8, p. 602 | |
| 5th ed. (1815) | ④ FERGUS | article | 71 | vol. 8, p. 602 | |
| 6th ed. (1823) | ⑤ FERGUS | article | 71 | vol. 8, p. 602 | |