In October 1870, when the union of Germany under Prussian headship became a practical question, Delbriick was chosen to go on a mission to the South German states, and contributed greatly to the agreements concluded at Versailles in November.
The Phoenicians, now shut up in one corner of the island, with Selinus on one side and Himera on the other founded right in their teeth, are bitter enemies; but the time of their renewed greatness under the headship of Carthage has not yet come.
Panislamic ideas have obtained little hold in this region; in Persia and wherever people are Shiahs the pretensions of the Sultan of Turkey to the headship of the Mahommedan world are rejected, as also in Oman, where the bulk of the population are Ibadhi.
In 1850 he resigned his headship of the Teachers' Seminary, and was awarded a pension.
As such he became the recognized spiritual head of all the Mahommedans of west central Sudan, a headship which his successors retained unimpaired, even after the loss of their temporal position to the British in 1903.
Some voted that a directory of princes should be appointed, others that there should be a president, eligible from the whole German nation; but the final decision was that the headship of the state should be offered by the parliament to some particular German prince, and that he should bear the title of German emperor.
The headship of Christendom was in his grasp, and schemes for a new crusade began to take shape.
System of succession left the headship open to the ambitious, and was a frequent source of strife both in families and between the clans.
A court of high commission of doubtful legality was subsequently erected (1686) to deprive or suspend clergymen who made themselves obnoxious to the court, whilst James appointed Roman Catholics to the headship of certain colleges at Oxford.
After standing unsuccessfully for the headship of the college in 1569, he became chaplain to the earl of Leicester, and received from him the livings of Warley, in Essex, and Dennington in Suffolk.