From Tatiana's letters on the main APTM site:
601,1359,Ts.S., Apr. 15, 1915,pp.84-85 "...Well, we've finished the lesson. I am writing to you again and am smoking the cigarette which you gave to me at the time of Lent and I did not have time to smoke it. I am enjoying it now."
601,1359,Ts.S., June 11 1915,p.91
"...I'm sitting in the garden opposite the Children's Island and enjoying myself. Ortino is lying at my feet and sleeping. We've just returned from the Grand Palace where we went to see the wounded... How silly I was not to take a cigarette with me. So, those damned mosquitoes are litrally eating me."