from Latin ēvestīgātus, pple. from ē out + vestīgāre to track, discover
1656-81 - Glossographia, or a Dictionary Interpreting Such Hard Words, as are now Used,
From:The Method of Instructing Children Rationally in the Arts of Writing and Reading
BY Joseph Neef, 1813
Section XIV. Including the words in which the letter e represents nothing.