Of course there is a bit of an ambiguity as to which David you are responding to ;-) !
But the approach of using the 2-argument form of
BeginPackage is tried and true -- it has worked for us for about 25 years since version 1 of Mathematica. And, indeed, it just worked for me now.
I am attaching two packages, TestPackage1 and TestPackage2. They each have one function,
TestPackage2 respectively. The function
TestPackage1 depends on
If both are placed in a directory called
dir and one then appends
or, more simply, if you simply put both packages in this directory
which you can open using
and all works fine. One gets
and life (an Mathematica) is problem-free from then on (at least in this small universe.