Although Mary Lee accompanied her husband to Hampton Roads, she spent about a third of her time at Arlington, though the couple's first son, Custis Lee was born at Fort Monroe. Although the two were by all accounts devoted to each other, they were different in character: Robert Lee was tidy and punctual, qualities his wife lacked. Mary Lee also had trouble transitioning from being a rich man's daughter to having to manage a household with only one or two slaves. Beginning in 1832, Robert Lee had a close but platonic relationship with Harriett Talcott, wife of his fellow officer Andrew Talcott. Life at Fort Monroe was marked by conflicts between artillery and engineering officers. Eventually, the War Department transferred all engineering officers away from Fort Monroe, except Lee, who was ordered to take up residence on the artificial island of Rip Raps across the river from Fort Monroe, where Fort Wool would eventually rise, and continue work to improve the island. Lee duly moved there, then discharged all workers and informed the War Department he could not maintain laborers without the facilities of the fort. In 1834, Lee was transferred to Washington as General Gratiot's assistant. Lee had hoped to rent a house in Washington for his family, but was not able to find one; the family lived at Arlington, though Lieutenant Lee rented a room at a Washington boarding house for when the roads were impassable. In mid-1835, Lee was assigned to assist Andrew Talcott in surveying the southern border of Michigan. While on that expedition, he responded to a letter from an ill Mary Lee, which had requested he come to Arlington, "But why do you urge my immediate return, & tempt one in the strongest manner[?] ... I rather require to be strengthened & encouraged to the full performance of what I am called on to execute." Lee completed the assignment and returned to his post in Washington, finding his wife ill at Ravensworth. Mary Lee, who had recently given birth to their second child, remained bedridden for several months. In October 1836, Lee was promoted to first lieutenant. Lee served as an assistant in the chief engineer's office in Washington, D.C. from 1834 to 1837, but spent the summer of 1835 helping to lay out the state line between Ohio and Michigan. As a first lieutenant of engineers in 1837, he supervised the engineering work