ɪn wˈʌn θˈaʊzənd θɹˈiːhˈʌndɹɪd fˈoːɹ hɪz bɹˈʌðɚz sˈaɪnd ɐ dˈɑːkjuːmənt ðæt fɚbˈeɪd ðˌɛm fɹʌm kəndˈʌktɪŋ ðɛɹ ˈoʊn fˈɔːɹən pˈɑːlɪsi ænd kˈɛpt ðˌɛm ˌaʊɾəv ðə ɹˈɔɪəl kˈoːɹt ʌnlˈɛs ðeɪ hæd spəsˈɪfɪkli bˌɪn sˈʌmənd.
In 1304 his brothers signed a document that forbade them from conducting their own foreign policy and kept them out of the royal court unless they had specifically been summoned.