Read the following letter from Henry Leavenworth, founder of Fort Leavenworth, to Mr. E.G.W. Butler. Write a paragraph that evalutes its credibility, purpose, and point of view. Compose complete sentences that use proper spelling and grammar. Refer to the words in bold at the end of the letter to determine the meaning of unfamiliar words.

The letter from Henry Leavenworth to Mr. E.G.W. Butler appears to be quite credible due to its historical context and the author's role as the founder of Fort Leavenworth. The purpose of the letter seems to be to provide information and updates on the construction of the fort. Leavenworth's point of view can be deduced from his positive tone and emphasis on the progress made in building the fort. He conveys a sense of optimism about the fort's potential for military and commercial success. The unfamiliar words "credible" and "context" are used to describe the letter's reliability and historical background.