UNSEARCHED! Almost 1.5 pounds of US and world stamps dating from the mid 1800's through the mid 1970's!

I’m 76 years old. Here are nearly a pound and a half of unsorted world stamps from my mother’s collection. She acquired a lot of these from HER mother’s collection, and stopped collecting in the mid-70s. A quick look-through found several US stamps from the mid to late 1800’s, and I can only assume that some of the foreign stamps are of similar dates! There are, literally, stamps from every corner of the world, and this collection is bound to have some rare and very collectible items in it! Who’s up for a scavenger hunt?