Sometimes “getting off the track” and searching sideways can lead to breakthroughs. Surely looking at the DNA results is not off track anyway?
What percentage DNA do you share with your high American matches?
Your ancestor was Australian aboriginal / African (American)? Did she marry a white man? Don’t necessarily assume there are no records of marriages, births etc. Several episodes of WDYTYA have shown otherwise, though I understand it may not have been the norm.
You say that you have seen records of your family but are not allowed to view them “without permission from …” Have to attempted to get that permission?
Regarding your family tree, you say there were three men in different branches who were described as having African heritage. Can you clarify please?
You seem a bit irritated by all the questions, but there is usually a method to our madness. (However, apologies for re-asking about the age of your family tree which you had previously mentioned). 
I’m fed up with the DNA questions because it’s not actually going to give me an answer any time soon. The dna is pretty irrelevant other than to say what we were always told is true. So I specifically asked not to keep focusing on the DNA but actual documents but yet it keeps coming back to dna, and yet people on here keep saying “take the dna test with a grain of salt”. So which is it? Is the dna the absolute vital or is it not really?
Right now, i’m not fussed about the dna because other family members are still waiting on their results which will hopefully tell us more but, it might not. And since i’m a woman, and this comes from my father i wasn’t looking for much there anyway.
My 3xg grandmother (Yorjup, Aboriginal name) had an Aboriginal mother (Yeates, Aboriginal name) and an African American whaler father. The family tree i inherited had two men listed as her father (John James Low and Somebody Mullane/y) she was known by both names. Both of these men were African American whalers. It was decided one was more likely her father than the other, but since the other was still connected to the family in a different way (his daughter married the other man’s supposed grandson) i have continued to search for that man as well because we can’t rule him out and he’s still the ancestor of some of my relations so i figured since i’m paying for an Ancestry subscription that i would find information for them as well.
Now, that 3xggrandmother (Yorjup) married a man whose father was a white man, also supposed to have been a whaler or sealer. We have been working on this one as well and discovered the family tree we inherited was wrong. We now don’t know who this whaler was but we have an idea of his name (inherited tree said Abby or Ebenezer harris) and he’s been confused with two other white men (sealer John Harris, absolutely horrendous man that we’ve now rules out and Ebenezer Harris a farmer originally from Kent but i’m not convinced he’s the right man although he was at the right place at the right time) I’ll look into this man later.
Then, my great grandfather apparently always said his parents were first cousins with their father’s being brothers. I ruled this out based on the fact my convict 4xggrandfather coming from Wales and the other man (Ebenezer Harris) assumed to be the other 4xggrandfather coming from Kent. But then i went back to a tree that had been written (and published in a book) showing 4xggrandmother had a sealer/whaler father (no actual name given, just says American) and not the head of the tribe. So now we’re working on the head of the tribe being her grandfather and the nameless assumed white but could have been black sealer/whaler being her father and the mystery of the other 3xggrandfather biological father (the Abby/Ebenezer person). But of course, no proof and probably wrong.
So that’s 4, and now you’re probably very confused.
As for the records, there are Native Welfare files. But they’re not official documents. My uncle signed permission for my sister to get them and they were given to my sister because someone in the office assumed my uncle was our father. I can’t get them unless my father signs permission for me to get them and i have no intention of ever speaking to that man. My uncle can’t sign for me to get them because he’s in the Phillipines and with borders closed he won’t be here anytime soon. Most of these documents have been destroyed, damaged in storage or are heavily redacted.
There are other documents that the government has but since these are tied to Native Title the government won’t let us have them. Apparently the Native Title lawyers can access them but we can’t get them or view them ourselves.
And again, there are NO records of marriages. It’s simply not how Aboriginal people do marriages. It’s still very much “shacking up”. This is the way it used to be and we still do it. I’m married tribal way to a man from Papua. We don’t have a piece of paper saying we’re married and we did this because it’s the way of our ancestors. There are no marriage records for Yorjup or her parents. It just did not happen that way and there might not have been consent involved, either. Not so much the whalers but the sealers were absolute scumbags who stole women and brutalised them. So there may not have been a “marriage” for her parents.