To me it appears there "is something wrong with this picture".
Massie wrote p. 4 in THE ROMANOVS, THE FINAL CHAPTER:
"...Nicholas followed, carrying his son, who could not walk, Alexis, crippled by hemophilia, was a thin, musular adolencent weighing eighty pounds but the tsar managed without stumbling."
Page 303 in King and Wilson's THE FATE OF THE ROMANOVS:
"Nicholas came first, carrying Alexei in his arms."
A fifty two year old man carried his son, who was taller than himself and probably weighed 120 pounds, not eighty,  not only [p. 304 FOTR] across a level floor but down a secondary stairs, across a courtyard area to another short flight of steps to the ground floor, through several or more hallways, through the guardroom  to the opposite end of the house, and, finally, they entered the "execution room"  ....
So, what do you think? Â Possible? Â Not likely? Â Not probable?
AGRBear