I was just checking something for another thread and when I looked here, I'm wondering how often a wizard comes into the magic before the age of 10? Based on the timeline, Carlos Ramirez was between 4 and 8 years old. His birth is given as 16-19 BSF and the trial is between 11-12 BSF. In DB Carlos seems to say that he was an apprentice at the time of Harry's trial. (top of page 375 of the hardback)
I thought that most Wizards tended to initially manifest in the early teens (basically the same time as puberty kicks in), but I may just be imagining that.
Or was there a correction to Carlos' birth somewhere that I missed, maybe? (or is this an unintentional slip in the book?)