For the convinience of readers.... Ahadiths mentioned in this case:
1. Narrated 'Aisha:
that the Prophet married her when she was six years old and he consummated his marriage when she was nine years old. Hisham said: I have been informed that 'Aisha remained with the Prophet for nine years (i.e. till his death)." what you know of the Quran (by heart)'
2. Narrated 'Ursa:
The Prophet wrote the (marriage contract) with 'Aisha while she was six years old and consummated his marriage with her while she was nine years old and she remained with him for nine years (i.e. till his death).
(I think the narrator is Urwa bin Zubair, brother of Abdullah ibn Zubair.)
3. Narrated Aisha:
The Prophet engaged me when I was a girl of six (years). We went to Medina and stayed at the home of Bani-al-Harith bin Khazraj. Then I got ill and my hair fell down. Later on my hair grew (again) and my mother, Um Ruman, came to me while I was playing in a swing with some of my girl friends. She called me, and I went to her, not knowing what she wanted to do to me. She caught me by the hand and made me stand at the door of the house. I was breathless then, and when my breathing became Allright, she took some water and rubbed my face and head with it. Then she took me into the house. There in the house I saw some Ansari women who said, "Best wishes and Allah's Blessing and a good luck." Then she entrusted me to them and they prepared me (for the marriage). Unexpectedly Allah's Apostle came to me in the forenoon and my mother handed me over to him, and at that time I was a girl of nine years of age.
*note: all from Sahih Al-Bukhari
there is one hadith in Sahih muslim and Sunan Abi-Dawood.
Now in the first one author has proved Sahih Al-Bukhari contradictory in the issue as he has found some other narratives of Abdullah ibn Umar and Anas which show that everyone at Badr and Uhud was at least 14 or above.
Narrated Ibn Umar:
The Prophet stood at the well of Badr (which contained the corpses of the pagans) and said, "Have you found true what your lord promised you?" Then he further said, "They now hear what I say." This was mentioned before 'Aisha and she said, "But the Prophet said, 'Now they know very well that what I used to tell them was the truth.' Then she recited (the Holy Verse):-- "You cannot make the dead hear... ...till the end of Verse)." (30.52)
Note: This proves that Ayesha was at Badr.
I can't find the other ahadiths right now. Insha Allah if I did, I will get back here.
But the point to think is, Ayesha was 9 or not??