Comment by Thorrez

> The 'indirect pointer' points to the memory address of the previous 'next' (or the head).

I don't think so. I think the 'indirect pointer' points to the previous 'next' (or the head). It doesn't point to the address of the previous 'next' (or the head). What you say is adding an additional level of indirection that doesn't exist.

Reality:

indirect -> previous next -> first element

What you're saying:

indirect -> address of previous next -> previous next -> first element

In reality indirect contains the address of the previous next, but it doesn't point to the address of the previous next.