For those like me, unaware of this very early work, here is
clarification of the title:

Dear Carolyn,

Yes, the play is The Tragedy of Mister Morn, Tragediia gospodina Morna
- not utro - Morna chosen for the English-language pun on
mourning and morning, I think.

yours sincerely,

Thomas

Dr Thomas Karshan
Lecturer in Literature
University of East Anglia
Room: Arts 2.32
Phone: +44 (0)1603 59 7588
________________________________________
From: Carolyn Kunin [chaiselongue@att.net]
Sent: 16 May 2012 23:23
To: Thomas Karshan (LDC)
Subject: Morn & A Tolstoy

Dear Thomas Karshan,

I was not aware of the oddly titled Nabokov play "Mister
Morn" (Gospodin Utro?), and regret that I won't be in London for your
performance.

with many thanks for an interesting post,
Carolyn Kunin