Literally ‘at an even’ [distance], as contrasted with (a) the same day (2, above), (b) the third day (ἐν τριταί& 251· διαστήματι (6, below). ἐν ἴσῳ must therefore be equivalent in sense to δευτεραίου. Possibly the literal sense is ‘[had the Resurrection taken place] at an equal interval between the Death and the [actual day of] the Resurrection.’