These are all of the collectibles (Treasures, Journal Entries, Journal Notes, Optional Conversations) that you can find in Chapter 8. There are no collectibles in the Prologue, Ch. 1, Ch. 4, Ch. 5 and Ch. 7.

0:05 - Treasure #16 (Redware and Silver Jug Flask)
0:32 - Treasure #17 (Bronze Boar)
1:09 - Treasure #18 (Carved Wood Kashkul)
1:41 - Treasure #19 (Carved Nut Bottle)
2:35 - Treasure #20 (Traveling Inkwell with Seal)
3:14 - Treasure #21 (Carved Ivory Vanitas)
3:45 - Journal Entry #1
4:09 - Journal Note #1
4:52 - Treasure #22 (Scottish Ha'Penny)
5:20 - Optional Conversation #6
5:56 - Journal Entry #2/Optional Conversation #7
6:20 - Treasure #23 (Slipjoin Clasp Knife)
6:54 - Treasure #24 (Pewter Singing Bird Box)
7:26 - Treasure #25 (Tortoise Shell Snuff Box)
8:15 - Treasure #26 (Persian Tailoring Scissors)

Check out the full guide: http://www.gamerguides.com/uncharted-4-a-thiefs-end/information

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