What happened
Start with what is not in dispute. The Rhode Island committee approved Silas Devol as captain of Marines for the Providence on 20 June 1776, selected Seth Chapin of Mendon, Massachusetts as second lieutenant two days later, and filled the first lieutenancy with Avery Parker on 26 June.
Those commissions had a price attached. A captain of Marines was to enlist forty "good men," a first lieutenant thirty-three, and a second lieutenant twenty-seven, and each officer had to meet his quota before he was allowed to accept his commission.
The sequence of what happened next comes from Earle.
In his affidavit he says he served about six months aboard as a sergeant, and then "the Second Lieutenant of Marines was broke and this deponent advanced to the place of the Second Lieutenant, the name of said 2d Lieut was Seth Chapin."
He says he then served as second lieutenant about four months, "at which time Avery Parker, the first Lieutenant of Marines on board said Frigate was broke and this deponent was then advanced to the first Lieutenant of Marines."
He says that four months after that, the captain of Marines, Silas Devoll, was appointed second lieutenant of the frigate, "whereupon he this deponent was advanced to the Captaincy of Marines in which capacity he this deponent served until the month of April 1778."
Read as Earle tells it, three advancements happen inside about eight months, and he then holds the captaincy for roughly seven more.
Now read how the historian handles it. In the biographical appendix, Smith writes that "Earle asserted that Lieutenant Chapin was 'broke' about December 1776." Asserted, not established.
Note also that the date has moved. In the deposition Smith supplies "January 1777" in square brackets, as an editor filling a gap; in his own appendix he writes about December 1776. Both are in the same book, and this entry uses January because that is the date attached to the quoted testimony.
Then Smith supplies the problem. "However, another source credits Second Lieutenant Chapin with having been a member of the court martial of Navy Lieutenant Richard Marvin on board frigate Providence, off Field's Point in the Providence River on 3 April 1777."
A man who has been broke does not sit on a court-martial four months later.
Smith does not resolve it so much as step around it. "Nevertheless, Chapin did leave the Marine service. He was appointed a first lieutenant on 19 July 1777 in Captain James Webb's Company, Colonel Henry Sherburne's Battalion of Rhode Island troops."
The same caution runs through the other entries. Parker was broke "circa April or May 1777," in brackets, inside a quotation from the affidavit. Devol's entry describes "Stephen Earle, reputedly a first lieutenant of Marines in Providence at this time."
Reputedly. That is the Corps's own historian, writing about a man whose rank at that moment rests on the man's own word.
The wider situation is documented independently and is not in doubt. The frigate Providence, Captain Abraham Whipple, was still under orders in early 1778 to escape her long confinement in the Providence River, and after a prolonged period of inactivity she had neither enough officers nor enough men to run the British blockade.
The Navy Board of the Eastern Department directed that new officers be appointed and that additional money, over and above what Congress allowed, be offered to every man entered on board. The narrative states that the original Marine officers appointed at her launching had, by early 1778, resigned.
Whipple's first task was to locate replacements. By early March he had selected a man he thought well qualified for the position of captain of Marines "to replace Stephen Earl who had temporarly assumed the post."
The man was William Jones, a former captain in the Rhode Island Regiment, recommended to the Navy Board at Boston: "He is a man well acquainted with the service having been in it most of the War, and has great interest in raising a Compy. of Marines."
The sources disagree about when the Providence next fought. The chronology puts Marines in her action against the British frigate Lark in Narragansett Bay on 30 April 1778; Smith has her making sail on the night of 1 May and meeting the Lark lying in wait as she entered the bay. Either way it is the same fight, and it falls within days of the end of Earle's own service in her as the affidavit gives it.