Meanings of conjectural emendation in English

The pronunciation of words in Shakspeare's time is a matter of no particular consequence, except that it may be made the basis of conjectural emendation.

This ballad is published from tradition, with some conjectural emendations.

"Why, can you not see?" said Panky, who was by way of being great at conjectural emendations.

(With new collation of the old MS. containing most of Books Seventy-eight and Seventy-nine, and with many new and brilliant conjectural emendations by the editor.)