Shortly after this, and with the consent of Queen Elisabeth, Henry I took with his troops her dower, Hradec Králové, where he organized expeditions in support of rebels against King John.

The division was formally accepted by King Louis IV, who became in the sovereign of Brandenburg after Waldemar's death, with the towns of Zgorzelec, Lubań, Trzebiel, Żary, Mirsk, Leśna, Zły Komorów, Żytawa, Ostrowiec and Rychbach passing to the Duchy of Jawor.

In 1320, Henry I captured a large portion of Lubusz Land to the northwest of Silesia, which he tried to reclaim as a region lost by his grandfather Bolesław II the Horned.

[6] On 27 July 1320, Henry I entered an alliance with Wartislaw IV, Duke of Pomerania in attempt to retain Lubusz Land and capture the towns of Strausberg and Wriezen.

The couple remained childless, although Agnes did have a pregnancy, but she suffered a miscarriage in the first trimester when she rode with her horse over a hill, who caused that she kept in bed for many months.

Today, in Lwówek Śląski was conserved a silver tombstone, called "The Nun and the Knight" (rycerz i zakonnica), who apparently represented Henry I and his wife Agnes.