When he went to Harrow School at the late age of eighteen, he could neither read nor understand one word of any language but Welsh.
His first publication was an advanced Latin grammar, called De Analogia, sive arte Linguae Latinae Commentariolus ... in usum provectioris adolescentiae, 1679.
The same editor brought out Baxter's fragmentary posthumous work, his glossary of Roman antiquities, under the title of Reliquiae Baxterianae, sive W. Baxteri Opera Posthuma.
He had prepared an edition of Juvenal with commentary and notes; but, in spite of Moses Williams's proposals, it never appeared.
[2] Baxter from the outset pursued physiological studies and other subsidiary investigations, in the 'Philosophical Transactions' and Archaeologia.