How to lay a few slabs and build a rill? The women wants me to build her a rill within the garden...

The women wants me to build her a rill within the garden (a long, narrow wet feature). She wants slate edging stones and i want to know what the best track to lay about 10 diminish slate slabs is. Also Is there a agency of cementing them which does not require me hiring a cement mixer? I've hear of all this unproblematic cement stuff but don't know if its any good.
Answers:    The rill itself will own to be made with cement and blocks covered near heavy-duty plastic sheeting.

When laying the slabs, incorporate a impermeable additive within the cement.

And yes, a cement-mixer will help, but it's without fault possible to complete a small project by hand.
Lay them cease to end. I show, how else would you do it? I'm sure there's a lot of smart associates out there that will make a contribution you a better answer. I do know about the cement though. you can carry at Home Depot or Lowes. Good luck