#sī nequeō facere ut abeās, egomet abierō#, Pl. _Poen._ 442, _if I can’t
make you go, I’ll instantly begone myself_ (1629). #sī id nōn facis, ego
quod mē in tē sit facere dignum invēnerō#, T. _Hau._ 107, _if you don’t
do it, I will have a proper course devised to use with you_.