perhaps somebody else can give us the quote?
Well, I'm at home now, so I can post it.

Xenia, Diary - 14 July - Peterhof
A nightmare - the day of the funeral of our dear, wonderful Georgy. The service began at 11 o'clock.
Mama did not sit down once, but stood there quite composed, without crying, but with an expression of profound suffering on her face. When they started to lower the coffin into the tomb, Mama, who had been holding me tightly by the hand, suddenly staggered, collapsed onto me (with wide open eyes, yet seeing nothing) and said loudly - 'Home, let's go home, I can't stand any more' and then tore herself away from me!
Nicky took hold of her from one side, but she kept pushing forward, trying at all costs to get past the tomb to go out, but it wasn't possible just then, as the tomb was open and there was no way past. Sandro was standing there, and supported Mama. After a short while they brought a plank for us to walk over.
Mama walked so quickly we could hardly keep up with her! It was such a nightmare, it will remain with me forever!
I had a terrible fright (as did all those present).
I kept thinking she was going to faint, but thank God, it didn't happen. None of us even had time to throw flowers into the grave of our Georjik!
In the carriage, Mama cried terribly, and kept pressing her chest to Georgy's hat, which she had snatched from the top of the coffin! It was terribly hard and painful for us to watch, while being unable to do anything to alleviate her suffering!
We drove straight to the landing stage, boarded the
Alexandria, and went immediately to Peterhof. Nicky, Olga and I rode with Mama in the carriage and on the yacht.
Once on the yacht, Mama started to regain herself and became calmer. I sat next to her the whole time, while the others had lunch below, they also brought us something, but Mama was unable to eat. The tears were beneficial to her, and little by little her nerves subsided.I bolded the things about Maria Fyodorovna. From what I can see, Maria Fyodorovna did not faint. Of course, there could be more of the letter, because at the beginning of
A Lifelong Passion, it said that parts of some letters were cut out. But this doesn't really tell us about Nicky's feelings, does it? Anyways, I suppose this a little bit off-topic.