How would you explain this sentence in the context?
Cortés let Moteczuma go free again and they were still friends, which seems strange. He showed Cortés the buildings and marketplaces, fine as any in Spain, and stone temples higher than the great church of Seville. Inside some, the walls were covered with the blood of human sacrifice. But the people had great culture and politeness of manners, with good government everywhere maintained, and stone pipes to bring water down from the mountains. Moteczuma had a grand palace and lattice houses where he kept every manner of bird, waterfowl to eagle. It took three hundred men to look after them all.
But really Cortés wanted a tour of the gold mines. Playing dumbdora, he told Moteczuma the land looked very fertile, so the Great King(in the previous passages, Cortes had said he was sent to there by a Great King) should like to have a farm there (over the gold mine). They fixed it up with maize fields, a big house for His Majesty, even a pond with ducks. Crafty Cortés.How would you explain the second to last sentence in the second passage: They fixed it up with maize fields, a big house for His Majesty, even a pond with ducks?
What does ‘fix it up’ mean here? And what does ‘His Majesty’ refer to?