Probably an abbreviated form from tla achiua, to do, or make something; lichua obedecer, to make to obey.
Erskine notes that the tla is about equal in weight to the silver rp.
Ekki er fr v sagt, hversu mikit f hann fekk hellinum; en at tla menn, at verit hafi nǫkkut.
Mtzensk, nearer the centre, is half-way between Orl and tla.
And so now the Governor of tla was travelling with his officials, officers, and soldiers, in order to perform just such a work.