I was just searching the flight report no. 9 of Andrée's balloon
Svea which I had packed somewhere because I ran out of punch pockets.
Now I looked into that Siemens-sponsored backpack we once got at a class trip to the Hannover Messe, because I saw that brown envelope in there. I pull it out, look inside...and find the flight reports 4 to 9 which I have looked for half a year before re-ordering them (for 26 euros)
.
(I had put the Flight reports 1 to 3 into their pockets and then stowed awar 4 to 9. When I had new pockets, I couldn't find them anymore, so I reordered them and got them filed, except for 9)