Two authors, at least, have been explicit on this subject.

Neither would the power of the stone come to him all at once: Gollard had been quite explicit on that point.

The orders of The Shadow had explicit on this point.

The orders were quite explicit on that point at least.

The Wolf had been explicit on that, clear in a dangerous way that only he could be.

I mean, the standing orders are quite explicit on the subject of several standard situations.

The administration has never been so explicit on this point.

We wish to be very explicit on this point.

The Stern report is quite explicit on the economic savings that can be made with regard to energy efficiency.