Referring to attached Fig 28 from bus&ss, note that it shows the south
boundary of KS at 36d 30'N. This is an obvious error since as outlined
below Kansas as a Territory and as a State has never extended south of the
37th parallel.

Figure 27 shows the correct south boundary of KS at 37d, but also shows a
dashed-line continuation of 36d 30'(circled on map) across what became
Oklahoma. Between the 100th and the 103rd parallels 36d 30' forms the south
boundary of the Oklahoma panhandle. Michael's concern is that that if the
circled portion of 36d 30' was at any time a border then, at least for a
time there might have been a quad point at the eastern end.

The following chronology of events leads me to the conclusion that there
probably was a quad point:

1. 1803 - Louisiana Purchase
2. 1812 - Territory of Missouri established which included all of the
original Louisiana purchase except the State of Louisiana.
3. 1819 - Treaty with Spain which fixed the boundary at the Sabine R.
This reduction was territory west of 100th meridian and south
of the Red R. (see fig.27)
4. 1819 - Arkansaw Terr. formed with western boundary at 100th meridian
and northern boundary at 36d 30'. This defines the encircled
boundary in Figure 27.
5. 1821 - Missouri was declared a State with the south boundary at
36d 30'N except in the SE corner of the State. The western
boundary was set at the point where 36d 30' parallel is
intersected by a meridian line passing through the middle of
the mouth of the Kansas R. where it empties into the Missouri
R.
6. 1823 - West boundary of MO was surveyed south from the mouth of the
Kansas R. A large stone post was set to mark the SW corner of
the State at 36d 29'58.0" N, 94d 37'02.9" W. This established
the tri-point of ARterr-MO-MOterr.
7. 1824 - Arkansaw Terr. was reduced by moving the west boundary from
the 100th meridian to approx. 95d 20'W to set aside the Indian
country. This did not change the 1823 tri-point.
8. 1828 - Further reduction in Arkansaw Terr. which established the
western boundary to its present location. see Figure 28.
This created the quad-point of ARterr-Indian country-MO-
MOterr. (note the map should show MOterr instead of KS).
9. 1834 - Indian Territory set apart as all that part of the area not
within the States of MO, LA and Terr. of AR. This apparently
did not change the quad-point.
10. 1836 - Arkansas became a State. Boundaries same as 1828. Note the
change in spelling which did not become official until 1881.
Quad-point still there.
11. 1850 - Act of Sept. 9 established the north boundary of State of
Texas at the point at which the 100 meridian intersects the
parallel of 36d 30'N. This established the remaining section
of 36d 30' between the 100th and 103rd parallels.
12. 1854 - Terr. of Kansas established with south boundary at 37d N.
13. 1861 - Kansas admitted as a State with same boundaries as Terr.
14. 1890 - Terr. of Oklahoma organized with north boundary established
at the southern boundary of Kansas. This eliminated the
quad-point.

The status of the strip between the west boundary of Missouri and the 100th
meridian between 36d 30' on the south, and 37d on the north is
not clear for the period 1828 to 1890. The only defining statement is that
the southern boundary of Kansas defined the northern boundary of
OK Terr. and eventually of the State of OK. This did not occur until
1890.
So, I now have to agree with Mike that a quad-point existed and was
marked by the then existing stone post at the SW corner of Missouri, which
is the location of the present AR-MO-OK tri-point. However, I
can find no references to any surveys conducted on 36d 30' from the
SW corner of Missouri to the 100th meridian. Albert White's book was
of no help since he was concerned with Principal Meridians and there
are none in the area in question.

Jack