Letters, another question bibliophiles ("carts" on Chaliapin)

[Elrick]

In continuation of the previous theme .
Along with the diary of Admiral , got two funny document : letters of the famous Russian opera singer Pavel Andreev ( http://ru.wikipedia.org/wiki/Андреев, _Pavel_Zaharovich ) chief conductor of the Mariinsky Theatre Emil Cooper ( http://ru.wikipedia.org/wiki/Купер, _Emil_Albertovich ). In these letters, Andreyev complains impossible , arrogant and conflict behavior Chaliapin, and asks him to find a council , and otherwise - does not vouch for their decent behavior . Somehow it <! - ~ 1 ~ ->

Again : can such documents be someone interesting , and how can they be evaluated?
Thanks in advance !

Sincerely,
Elrick