Additional attribute(s) on the Personal Letter label
MJ. Smith
MVP Posts: 54,536 
As you can see from the quote below, an attribute for "on behalf of" (or "against") is a needed attribute. When it is added, then the Personal Letters section of Factbook should include letters selected based on it.
"CHAPTER XXI
LETTER OF CONSTANTIUS TO THE EGYPTIANS IN BEHALF OF ATHANASIUS. SYNOD OF JERUSALEM
THE emperor, on sending back Athanasius to Egypt, wrote in his favour to the bishops and presbyters of that country, and to the people of the church of Alexandria, commended the integrity and virtue of his conduct, and exhorted them to be of one mind, and to unite in prayer and service to God under his guidance. He added, that, if any evil-disposed persons should excite disturbances, they should receive the punishment awarded by the laws for such offences. He also commanded that the former decrees he had enacted against Athanasius, and those who were in communion with him, should be effaced from the public registers, and that his clergy should be admitted to the same privileges they had previously enjoyed; and edicts to this effect were despatched to the governors of Egypt and Libya."
Sozomen, A History of the Church in Nine Books (London: Samuel Bagster and Sons, 1846), 141–142.
"CHAPTER XXI
LETTER OF CONSTANTIUS TO THE EGYPTIANS IN BEHALF OF ATHANASIUS. SYNOD OF JERUSALEM
THE emperor, on sending back Athanasius to Egypt, wrote in his favour to the bishops and presbyters of that country, and to the people of the church of Alexandria, commended the integrity and virtue of his conduct, and exhorted them to be of one mind, and to unite in prayer and service to God under his guidance. He added, that, if any evil-disposed persons should excite disturbances, they should receive the punishment awarded by the laws for such offences. He also commanded that the former decrees he had enacted against Athanasius, and those who were in communion with him, should be effaced from the public registers, and that his clergy should be admitted to the same privileges they had previously enjoyed; and edicts to this effect were despatched to the governors of Egypt and Libya."
Sozomen, A History of the Church in Nine Books (London: Samuel Bagster and Sons, 1846), 141–142.
Orthodox Bishop Alfeyev: "To be a theologian means to have experience of a personal encounter with God through prayer and worship."; Orthodox proverb: "We know where the Church is, we do not know where it is not."
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