Good note. In my dog-eared copy of ATOTC, dating back to 1970 when I was in the 12th grade (ouch!), there is the seamstress as you note. And as you note, his last thoughts are written (but not spoken aloud):
"I see that child who lay upon her bosom and who bore my name, a man winning his way up in that path of life which once was mine. I see him winning it so well, that my name is made illustrious there by the light of his. I see the blots I threw upon it, faded away. I see him, fore-most of just judges and honoured men, bringing a boy of my name, with a forehead that I know and golden hair, to this place—then fair to look upon, with not a trace of this day's disfigurement—and I hear him tell the child my story, with a tender and a faltering voice.
It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to than I have ever known."
In the movie, as Carton/Colman begins his ascent to the guillotine, the camera pans skyward and you hear his last lines - his last thoughts before the blade falls. "It is a far better..." Then on screen comes the verse: "I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live." And thus concludes a really great movie with great acting, marvelous dialog and much in noble sentiment and redemption.