These are all of the collectibles (Treasures, Journal Entries, Journal Notes, Optional Conversations) that you can find in Chapter 12. There are no collectibles in the Prologue, Ch. 1, Ch. 4, Ch. 5 and Ch. 7.

0:05 - Journal Entry #9
1:14 - Journal Note #5
1:46 - Treasure #53 (Combination Lock Tobacco Box)
2:58 - Journal Entry #10
3:56 - Treasure #54 (Brass Pocket Sundial)
4:24 - Journal Note #6
5:28 - Journal Entry #11
6:14 - Treasure #55 (Silver and Wood Tankard)
6:29 - Treasure #56 (Persian Silver Pen Box)
6:59 - Treasure #57 (Panamanian Pendant)
8:08 - Treasure #58 (Persian Leather Notebook Case)
9:24 - Treasure #59 (Deccani Bronze Spouted Bowl)
9:55 - Treasure #60 (Mughal Elephant Carving)
10:28 - Optional Conversation #12
11:16 - Treasure #61 (Ottoman Helmet)
11:40 - Treasure #62 (Deccani Bronze Vase)
12:09 - Treasure #63 (Strange Relic)
12:52 - Journal Entry #12
13:19 - Treasure #64 (Hamsa Mythical Goose)
13:55 - Journal Entry #13
14:25 - Optional Conversation #13
16:29 - Treasure #65 (Pique Tortoise Shell Box)
17:03 - Journal Entry #14

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

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