In early 1849, according to a letter written by Longacre the following year, the chief engraver was approached by a member of the Mint staff, warning him that another officer (plainly Peale) sought to have the engraving work done outside of the Mint, making Longacre redundant.
When Longacre completed the double eagle dies, they were rejected by Peale, who stated that the design was engraved too deeply to fully impress the coin, and the pieces would not stack properly.