"Euler's letter was probably intended for his notice, though addressed to Gael Morris; but there appears to have been no great inclination on Bradley's part to indulge a reciprocal desire. It may be said, that, as we have only the rough copies of his answers, which he may not in every instance have preserved, we do not know the number and extent of them. There certainly were many of which we have no remains; but still he seems to have seldom written unless some particular object required it, and there are repeated occasions on which his correspondents indicate the fact of his not having answered the letters which he had received. If, therefore, his great disinclination from studied composition made him remiss in keeping up an intercourse with such distinguished characters, it is not astonishing that a number of idle letters which were addressed to him may have been wholly unattended to. Many of these have been found among his papers which were wholly unfit for publication."