Link to pages in a different graph?

Possibly a stupid question, but I am wondering if there’s a way to link to pages in a different graph if needed.

I created a new graph for a sort of personal memoir project. Maybe I should have just made a namespace for it instead of a new graph?
Initially I thought separate graphs would be better to keep my one graph from getting out of hand…but now I’m a little torn because I may want to link the odd thing from my main graph now and then.

Thanks for any input/help.