These photos were taken by Don Monroe back in the 1970’s and recently discovered among his things that were boxed up. Don Monroe has been adamant that there were large skulls there then, that are now missing. This seems to support his claim.
I hope that this serves to clear up whether these larger skulls did exist at the Humboldt Museum. Right now they emphatically deny that such skulls were ever there. They obviously were. Here’s what they pass out now when you go in there.