I looked for vol two as well and can't find anything about it. However, I read in the introduction on page 10 next to the last paragraph that this vol was Morales' first 500 objects he observed and recorded. I assumed that the next 500 objects he observed and recorded would be vol two.
Ah. Thanks Richard. I should've looked more closely.
I'll file "Morales Volume Two" away between "Marfa Lights" and "Nessie."