(?) Psellos wrote to Konstantinos, nephew of Keroularios, that he was involved in tactics & siege engines (at Chliat?)

Summary:
It is not possible to exclude the possibility that this letter refers to the presence of Psellos at Chliat during the Mantzikert campaign. The strongest evidence is that Psellos claims elsewhere to know about the emperor's presence at Mantzikert before Romanos IV. But on balance the letter is more likely to have been written during Psellos' sharing of Romanos' expedition in 1069 
Dates:
1071 (Uncertain) 
Konstantinos, nephew of patriarch Michael I Keroularios (Konstantinos 120)
  • He was told by Michael 61 that he was in a military phase, building machines amidst depression and uncertain imperial favour; Konstantinos and Nikephoros 111 should not expect many letters and should guard Euphemia 103 and her family (?) (:) Psellos Letters (Sathas) 186.470-473
Michael Psellos (named Konstantinos till tonsure in 1054) (Michael 61)
  • He told Konstantinos 120 he was in a military phase, constructing machines, perhaps to return shot through the air; all were depressed and the favour of Romanos 4 uncertain (:) Psellos Letters (Sathas) 186.470-471
  • He wrote to Konstantinos 120 that he was in a military phase Psellos Letters (Sathas) 186.470-473