LOL Can't remember, but if it's the Hungry Caves...did you discover that SR on the bottom of the empty looking cave...arg...think where it was. I'd wander aimlessly trying every nook and cranny, too LOL If not in that one, then it may be the one you need to jump down to get to the tracks...or enroute to pickup Hirado and on to the fortress.
I have to remember to save before entering a new area cause I have the tendency to always reach that 'point of no return' and have to continue onward. Man...not enough save points LOL
Wish I could remember where
PS my sister baked a mini 6" diameter 'vanilla' cake in the slow cooker for me

Got to pig out LOL