How does harkhuf's autobiography and the letter from the pharaoh illuminate early egyptian interest in nubia and the processes by which egyptians of the old kingdom developed knowledge about nubia?

Harkhuf in his collection of memoirs portrays four undertakings into Nubia. In the first place, he composes that Pharaoh his ruler sent him together with his dad to Nubia to open the path to that nation and when he returned he brought many blessings from that point. He went a moment on numerous occasions returned with blessings, the third time he returned with three hundred conveying a ton of presents and in conclusion, was the letter from Pharaoh which affirmed that to be sure Harkhuf had been to Nubia and had carried with him a dwarf of the god's moves from Nubia.

Of all the gas giants, neptune has the longest period of revolution. : )