In 1529 he brought out his Oeconomia christiana (a treatise in German, on the right ordering of a Christian household) with a dedication to the duchess Sybil of Saxony and a preface by Luther.
Above the Athenian treasury is an open space, in which is a rock which has been identified as the Sybil's rock.
As was shown later, he imported into his view of politics a warm sentiment and an imaginative outlook; and he was an enthusiastic student of Lord Beaconsfield's political novels, more particularly of Sybil, after the heroine in which he named one of his daughters.
The elder daughter, Lady Sybil, in 1903 married Captain Charles Grant; the younger, Lady Margaret, in 1899 married the 1st earl of Crewe.
Sybil, which was written in the following year (1845), is still more remarkable for the faculties celebrated in the preceding paragraph.