Picture guides are a menace to follow as you can never determine where the collectable is going to be, I have found a video walk through for the users of this site. Enjoy!
First video 1-15
Second Video 16-37
Third Video 38-59
Fourth Video 60-89
If this video guide is not enough for you or you get stuck on the chapters which you can free roam *I know I did* here are two other guides which helped me in situations which I found difficult.
--These guides are text guides with detailed information--http://wikicheats.gametrailers.com/index.php/Call_of_Juarez:...http://www.xbox360achievements.org/forum/showthread.php?t=15...
The video guide works perfectly and it took me just over 2 days *on and off* of going through the game collecting all the collectibles.
Please rate & comment if you have found this guide useful.