Online Sunnah
I just came across a fantastically useful website, Sunnah.com, which I can use to look up passages of the Hadith and bookmark them:
This means it’s possible to create a crib sheet of the relevant passages of the Hadith, such as in Sahih al-Bukhari #5133, where his wife explains that Muhammad married her when she was six and consummated the marriage when she was nine .