to conclude a bargain

‘Well, well, look what the cat's dragged in,’ Gracey said as he moved the thick stump of his neck from side to side and rubbed the back of it with the great towel of his hand. ‘Nice to see you grace us with your presence, Swift. […]’

Sumerian civilization lasted for an entire Platonic month from 4000 to 2000 B.C.

However, aza N-atoms (~N=) have to be counted, if they replace methine groups in the chain.