How grammatically stupid I am

[Eva Elisabeth]

No help or advice (!!!) - just curious and willing to improve my own skills: Isn't "workings" the subject of the subordinate clause ("therein lie the workings of another study") and "another study" the (genitive??) object? If it's an analysis, won't present tense be correct ? And they still lie therein, don't they? It's still valid, isn't it?