Ok- so first of all whatever the tree is I am very surprised no one has made any comments on the felling tactic in first pic. Safety first! Please don’t take any offense to this I say it to potentially save your life firemaker. I think it’s a noble thing to cut down a tree with a hand saw in 21st century but please whatever your method in future stick to basic 101 safety with face cut, THEN your back cut. You can do a standard face cut, wide open birds beak face cut, Humboldt cut, all depends o. Situation but no matter what your cutting is heavier than you, face cut then back cut always in that simple order. Face cut usually about a third in but sometimes more or less depends on a lot of factors. Anyhow happy to give more advice about it but research it some before felling your next tree, this “arborist” thing is most dangerous job in world on ground or in tree. Anyways with that out of way will make desperate post replying to this specimen question