How recently did SS write in Potions book?

[M. Thitathan]

No: HPFGUIDX 141730

Hagrid  wrote: "-Who could he practise the "sectumsempra" curse on while a student without getting expelled. (Remember, McGoonagall heard what Harry did to Draco, yet didn't recognise the injuries from Snape's years at school. Both she and Mdm. Pomfrey were at Hogwarts then and would have remebered Snape for inventing something that causes such wounds)

- Much of the hand-written entries were faded and hard to read ... 
but not all."
 

CH3ed: 
Well,  Snape did use a hex on James that Harry saw in the pensieve that lacerated James' face. I don't think he said it out loud but it might have been septumsempra. 
 
The book originally belonged to Snape's mom, Eileen Prince and is nearly 50 yrs old (CH.16: A Very Frosty Christmas). She might have wrote something in the book (the faded portions?)Snape went to Hogwarts the same time James and Sirius went and that wasn't 50 yrs ago, but curiously, LV and Hagrid did go to Hogwart around that time frame... that makes it interesting. I wonder if Hagrid has any useful memories of LV and Eileen?