Mystery herb - who can help?

The other day I bought an unusual herb. I had been looking for this one for quite a while and was pleased to see it at last, in the Glastonbury market. I think it was called english coriander, but unfortunately I have erased every trace of the name on my computer. And now I'm not so sure, as I can't find this name at all in my famous tax-evading search engine!
The herb has obviously been split rather than sown, and looks like it might be low-spreading. It smells a bit like a cross between thyme and tansy, and has 2cm long, narrow, serrated leaves. Can anyone help in my rather hopeless quest?
Thank you!

 

Easier said than done, I'm no photographer nor technically inclined. I hope I managed!

http://s109.photobucket.com/user/Annemieke46/media/herb.jpg.html

 

http://www.google.fr/imgres?q=tansy...&ndsp=17&ved=1t:429,r:6,s:0,i:96&tx=69&ty=118 Sorry about the excessively long link! It's tansy

 

Nope. I found out it is English Mace, achillea ageratum. I'm not quite so keen on the smell, and am still experimenting how to use it. Next year you can all have a cutting!

 

Says it repels Moths, that's handy cos I've got Moths.

 

Funnily enough, I was looking up English Mace at the weekend but wasn't sure it was it ... so pleased you have discovered it's identity ...

http://www.celtnet.org.uk/recipes/herb-entry.php?term=English Mace

 

So does southernwood of which I have a large bush, as opposed to the mace which is (still) tiny! Long may it grow, for I like real (though secondhand) wool for my clothes.

 

I found an excellent herb stall at Wells market last summer, wonder if it's the same company?

 

Yes, I saw that. I had it in my breakfast soup today, but found it had no taste. Maybe I should have added it at the last minute, like parsley. Try again tomorrow!

 

Yes, it's quite nice if you add it afterwards, cut very finely. Am already getting addicted. Pity it's still so small!