Albus Dumbledore's letter to Harry Potter (1996) III

This letter was written by Albus Dumbledore to Harry Potter on October 12, or 19, 1996. The letter was delivered by Ginny Weasley, and contianed the date of the next private lesson between Harry and Dumbledore, which was to take place on the next Monday (which would be the 14th or 21st).

Apprences
Harry Potter and the Half-Blood Prince (Chapter 12, Silver and Opals)