library in library

Can I use a library in a library? If so, how? Do I instantiate it just like in a sketch?

You have to include the header file in your library's header/implementation file AND in the IDE to link in the library itself.

Sounds good. Thanks. Do I need to declare a new instance of the second library within the first library?

loveforvdubs:
Sounds good. Thanks. Do I need to declare a new instance of the second library within the first library?

Very unlikely. Can you replace your abstract talk with the actual names, such as," can I use the keypad library inside of the time library for XXX purpose?"?