[2] Henry remained an ally of his cousin and in 1294, 1295 and 1297 he was commander of the army against Landgrave Albert II ‘the Degenerate’ of Thuringia.

[4][7] During the reign of Adolf, Henry participated in the campaign of Count Guy of Flanders against King Philip IV ‘the Fair’ of France.

Henry obtained Siegen, Ginsburg Castle [de; nl], Haiger[9] and the lordship Westerwald.

[4] In a charter dated 28 February 1305, “Henricus comes de Nassauwe” and “fratri nostro Emichoni comiti ibidem … eius … conjugi … Anne” reached an agreement on the distribution of the legacy of “auum nostrum Emichonem comitem de Liningen et ex morte Emichonis filii sui comitis ibidem nostri avunculi”.

[4] In 1309 Henry bought out the Lords von Wilnsdorf and vom Haim and made them vassals of Nassau.

[5] Henry and his brother John got involved in heavy disputes with the Landgraves of Hesse, who, as lords, supported the local gentry against the ambitions of the Nassaus.

In the comparison concluded on 26 June 1312 between Landgrave Otto I of Hesse on the one hand and the counts Henry, Emicho and John of Nassau on the other, both parties agreed not to build castles against each other anymore, and the Nassaus admitted that they were not allowed to restrain the rights of Lords von Dernbach and von Wilnsdorf, which they had possessed at the time of Count Otto I of Nassau.

The last known activity of Henry is when he reached a comparison with Archbishop Walram of Cologne over the joint rule over Siegen, in the summer of 1343.

‘Aleydis uxor… Henrici comitis de Nassouwia’ renounced the legacy of ‘felicis recordationis … Walrami domini quondam de Blanckenberch fratris nostri’ in favor of ‘nostrum consanguineum … Theodericum dominum de Heymsbergh et de Blamckenberch militem filium quondam domini Godefridi fratris nostri’, with the permission of ‘domini Henrici nostri mariti comitis prelibati nec non Ottonis militis primogeniti ac Henrici prepositi Spirensis nostrorum filiorum’, in a charter dated 8 March 1333.