That is, one that is not taken from the spreadsheet.
Before I start banging my head against the wall, I thought I would ask
the experts!
Something like:

Sub MySub
Dim HLookupArray as Variant
Dim n,m as Long
n = Something
m = SomethingElse
LookupVal = SomethingElseYet
HLookupArray = Array(n,m)

(In hear put code assigning values to the array nodes)

SlowWalker = Application.HLookup(LookupVal, HLookupArray, 4, False)

End Sub

Thank You,
-plh