Nancy, First "Thank you".
Unfortunately, it is not that easy. While the LDS indexing is a godsend, it was a semi-automated process and many people that are original settlers of a place are shown as born there - in this case years before the first settler appeared. [Profiles that show birth in Levant before 1785, or much of anywhere else near Bangor, are suspect. The people are real, but the system is flagging the town they had children in as their birth town.]
From "Ichabod married ..." down is correct. However, the 1800 census shows Ichabod (age 23), Ichabod (age 26~44), 2x Joseph (age 26~44), and Aaron (age 26~44) coming from the St. John river valley.
'The earliest regular settlement of the county commenced in Bangor, in 1769; then followed settlements at Brewer and Orrington, 1770; Hampden, 1772; Oldtown, 1773; Orono, 1774; Veazie, 1786; Eddington, 1780; Holden, 1786; Hermon, 1791, Newport, 1794; Charleston and Corinth, 1795, Carmel, 1796; Levant and Newburg, 1798; Dixmont, 1799; Hudson, Kenduskeag, Milford, and Stetson, 1800; Dexter and Exeter, 1801; Garland, 1802; Bradford, 1803; Corinna, 1804; Glenburn, 1806;
"The original settlers of the tract occupied by Levant are understood to have been the brothers George and William Tibbetts, and two other persons named Boobar {Bubiar} and Knowland ; but the date or dates of their coming are not certainly ascertained. They were on the ground, however, sometime before 1800. Mr. Williamson, the historian, says that the first settler in Levant was Joseph Clark , one of the refugees who fled with Colonel Jonathan Eddy from Nova Scotia after the unlucky affair at Fort Cumberland in September, 1776, and that Clark began to fell trees in Levant as early as 1789. (History of Penobscot County, Maine, pg. 404)
Many "records" (I have only second hand writings show an older Joseph Clark as an original settler of Maugerville, Sunbury County, now New Brunswick.
https://minerdescent.com/2012/10/15/new-england-planters-in-new-brunswick/ “The list of the grantees of the Township of Maugerville, …, includes the following names: ... Joseph Clark, Widow Clark.” It is possible she was not a widow then and he died later, but that the histories later called her Widow even before he died and only a single lot is listed before the Loyalist Dr. Joseph Clarke came 20 years later…
Last night I found:
"Canada Births and Baptisms, 1661-1959," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:FLG6-562 : 10 February 2018), Joseph Clarke, 12 Dec 1768; citing , SHEFFIELD, SUNBURY, NEW BRUNSWICK, 12 Dec 1768, reference 2:16T0T45; FHL microfilm 928,969.
Sheffield is the town next to where the Clarks lot was (Maugerville), but the church was moved there and the records likely from the church. We learn that thousands - mostly from Essex County, but also from the rest of new England, flooded into 'free' land on the St. John river and in modern Nova Scotia. Many rebelled ten years later and their origins were poorly documented to start and erased by Loyalists in the end.
I also have several marriages of relevance
.1793, Dec. 23 Joseph Clark Jr. and Mrs. Jane Potter p. 48
1793, January 2, Arad Mayhew and Elizabeth Clark p. 48
1796, Nov. 8 Ichabod Clark (1777) to Mary Lancaster p. 39
1799 Oct. 5, Richard Lancaster (Mary’s brother) to Thankful Clark p. 57
https://books.google.com/books?id=TgE8AAAAIAAJ&pg=PA41&lpg=PA41&dq=%22ohio+settlement%22+maine&source=bl&ots=c_OqZq1ZlB&sig=-1GjixPwsLKAMC0HT1MgnQyXUtg&hl=en&sa=X&ved=2ahUKEwiJ-6TGp4feAhUPU98KHaStCSsQ6AEwBXoECAQQAQ#v=onepage&q=clark&f=false The Maine Historical Magazine, Volume 1
Erma Winters' "A history of Kenduskeag, Maine" ”, pg. 8-9 we find:
“There were at least two residents in the township when Wetmore bought it. A William Tibbets, who built his cabin in 1786, told his children that there was not another white man at that time between him and Canada. There was also Joseph Clark who had been with Jonathan Eddy at Fort Cumberland. Williamson’s history reports that Clark was felling timbers and making “a beginning” in 1789. Clark, and his brother, Benjamin*, built the dam on Black Stream at what is now Levant Village. (* Erma Williams claims direct descent from Benjamin.)
…
The census of 1800 gives the township and “adjacent places” 129 inhabitants. Williamson’s history says there were 11 families, and names George and William Tibbets, a Mr. Knowland**, and a Mr. Boobar***. Joseph Clark, who had been living on Lot 2 in the 4th range for 11 years must have been a fifth family. His brother, Benjamin, may have settled there by that time.”
So:
1) Joseph Clarke Sr. b < 1749, m. < 1767, Sarah ???, moved from... ? to Maugerville/Sheffield c. 1766 and died there [assumed]
2) 12 Dec 1768 Joseph Clark Jr. m. Jane Potter 1793; settled in Levant 1789
3) ... uncertain.
1) (maybe 3?) Another Joseph Clark from New Brunswick
1) Ichabod Clark b? d? settled in "new Ohio" (Corinth, Maine?)
1) (possible (3) above or 2 to Ichabod-1) Ichabod 1777-1829 the one i am trying to find ancestors for...
1) Aaron Clark m. Margaret ???, d. 1809, Bangor, Maine.
So, I pushed the wall back a generation on the documentable Joseph, whether uncle, father, or cousin, but no movement on the others. Benjamin Clark should be trackable and there are unsourced profiles saying Georgetown, Maine, 1765. That [leaving Georgetown for New Brunswick after 1765 and then having Joseph there] would fit with Joseph Clark and Joseph Bubier lots being nearly last in the original Maugerville progression up the river (landing them on the river c. 1767 with a son before and a son after).