Henry, now secure of meeting with no interruption on this side, advanced with his army into Brittany; and Conan, in despair of being able to make resistance, delivered up the county of Nantz to him.

The able conduct of the king procured him further and more important advantages from this incident.

Conan, harassed with the turbulent disposition of his subjects, was desirous of procuring to himself the support of so great a monarch; and he betrothed his daughter and only child, yet an infant, to Geoffrey, the king's third son, who was of the same tender years.

The duke of Brittany died about seven years after; and Henry, being mesne lord and also natural guardian to his son and daughter-in-law, put himself in possession of that principality, and annexed it for the present to his other great dominions.
{1159.} The king had a prospect of making still further acquisitions; and the activity of his temper suffered no opportunity of that kind to escape him.

Philippa, duchess of Guienne, mother of Queen Eleanor, was the only issue of William IV., count of Toulouse; and would have inherited his dominions, had not that prince, desirous of preserving the succession in the male line, conveyed the principality to his brother Raymond de St.Gilles, by a contract of sale which was in that age regarded as fictitious and illusory.