Underlined on map below:

NOTE: 150 acres is about 1/3 the size of the rectangle for Boone Mill, and if square, almost 1/2 mile on a side (almost a quarter section). Since the land touched or crossed both Little Creek and Mill Creek, it had to be where the creeks were about half a mile apart at that time. It was also adjoining George Griffith's land, and a William Griffith is shown on the map. According to a USGS map, the branch of creek south of Bunker Hill was part of Little Creek. The branch to the left of the name Conrad Harkrader could be Fox Branch. I would say the land was at the red X, just southwest of Boone Mill, and 8 or 9 miles NNW of Rocky Mount.

"This Indenture made this Sixth day of February, one thousand Seven hundred & ninety two between Daniel Dillman of the County of Franklin of the one part and Phillip Hartzell of the same County of the other part Witness that he the said Daniel Dilman for and in Consideration of Sum of One Hundred & Sixty pounds Current money of Virginia to him in hand paid by the he(?) the Said Phillip Hartzell the Receipt(?) where of the said Daniel Dillman doth hereby acknowledge hath granted and Sold and by this presents doth grant Bargain and sell, Deliver & Confirm unto him the said Phillip Hartzel his heirs and assigns for ever one Certain(?) Tract or parcel of land containing one hundred fifty acres more or less lying and being on the Mill Creek, and bounded as follows to wit. Beginning at a poplar tree on a Branch which is called Fox Branch, thence down the same (branch) to a poplar Corner tree, thence to a Corner white oak then in bound by Spencer's old line on the south side of Little Creek to a corner Black Oak, from thence to a Corner Black Oak from thence continuing George Griffith's line thence bounded by Jacob Dilman's line & from thence William Spencer's new line agreement to Corner white oak from thence continuing the old line to a Chestnut tree on the east side of the Mill Creek from thence with the said line to a white Oak on the top of the hill North following the same Old line to pointer, from thence with it to a Black Oak on North side of (Fox?) Branch from there to first Station." ...

Witnesses: Moses Greer, Chattin? Pollard?, Moses Greer Jr.

Some parts of the metes & bounds land description is hard to read, but by checking letters and numbers against other parts of the document, and making sure it comes out to about 18 acres, my estimation is below. Not knowing the path of the stream, I used basic geometry to work backward from the Harter Corner Stump to the upstream Poplar tree. Then I drew in the stream.

... a parcel of land lying and being in Franklin County on Fox Branch a Branch of Mill Creek and bounded thus beginning at the said Harter Corner Stump,
South 18 poles to a Hickory,
South 54 West 18 poles to a Dogwood on the branch (54 degrees west of south),
thence up the same as it meanders to a Poplar,
North 24 West 14 poles to a Black Oak,
North 69 East 79 poles to a White Oak,
South 40 East 24 poles to the beginning,
containing 18 acres.
I drew the creek last. In metes and bounds descriptions, the beginning and end rarely meet due to variations in measuring and compass direction. The creek could have been at more of an angle, but this is close enough for a rough idea.

1 pole = 1 rod = 16.5 feet 1 acre = 160 square poles 1 mile = 320 poles

Notice that Fox Branch flows nearly West to East, more or less, depending on the accuracy of my drawing. Being a branch of Mill Creek, it presumably flowed into Mill Creek on the right (East). Therefore, this land was west of Mill Creek, and presumably east of Little Creek.
This land sale should give some clues on the location of Philip's 1792 land purchase.
Philip's 1792 purchase BEGAN at a Poplar tree on Fox Branch, then went DOWN the branch. It ended at a Black Oak on the north side of Fox Branch, and from there to the first station (the Poplar on Fox Branch). These two points are on the left in the drawing above for the 1797 sale. The 1792 land description, agonizingly devoid of any compass bearings or distances, goes counter-clockwise. It goes along Spencer's old line on the south side of Little Creek, along George Griffith's line, then Jacob Dilman's line, then William Spencer's new line, then to the east side of Mill Creek, to the top of a hill north, and back to the beginning. I think the land sold in 1797 was a piece on the north of Philip's 1792 land.

This implies that Philip's 1792 land included a stretch of Fox Branch, Little Creek, and Mill Creek. I am currently looking for the location of Fox Branch.

From Wm. Greer Corner Red Oak on the Road,
thence South 70 West 10 poles to a Chestnut,
South 10 West 94 poles to a Red Oak (looks like the 74 was corrected to 94),
North 87 East 14 poles to a Red Oak,
North 80 East 44 poles to a Red Oak,
North 45? East 21? poles to a Red Oak on the road,
thence up the road North, North 54 West 83 (poles) to the Beginning.

Here I drew the road last, and it came out at North 30 West, not North 54 West as specified in the land record. Again, the beginning and end of a metes and bounds description don't usually meet. I will try to redraw, but in the meantime it's not that important. A rough estimation of the area of this drawing comes out to about 20 acres, so that's fairly close. All we need for this one is a general idea of the shape and location of the land.

Beginning at a White Oak on the River (Blackwater River?),          DRAWING BELOW NOT TO SCALE OF ABOVE DRAWINGS
off with Webster's line North 73 East 38 poles to a white oak,
North 18 East 120 poles to a red oak,
North 20 West 60 poles to a red oak,
North 36 West 160 poles to pointers,
off new lines North 35 East 70 poles to a chesnut oak,
North 64 East 172 poles to a chesnut tree,
North 32 West 36 poles to a white oak,
North 38 East 40 poles to a red oak,
East 42 poles to 2 chesnut trees,
South 23 East 48 poles to a chesnut tree,
thence with it to Rank's line,
with it to George Hartzel's line (who m. Nancy Goode?; land next to Toney),
with it to Toney's line,
with it to John Webster's line,
with it to the river,
thence up the same as it meanders to the Beginning (notice UP stream).