On page 85 of A Faith That Is Never Alone, Mark Horne quotes Turretin in order to prove that no merit of any kind was operative in the Covenant of Works. Unfortunately for Mark’s argument, he leaves out pactum merit, as he does time and time again. He also leaves out half of the Turretin quotation. Here is what Mark includes:
Thus, Adam himself, if he had persevered, would not have merited life in strict justice (p. 712 of volume 2 of the IET).
However, Mark left out the second half of the sentence, which goes on to say precisely what Mark will not allow anywhere in his theology:
although (through a certain condescension) God promised him by a covenant life under the condition of perfect obedience (which is called meritorious from that covenant in a broader sense because it ought to have been, as it were, the foundation and meritorious cause in view of which God had adjudged life to him).
Notice Turretin’s qualifications. None of this matches up to strict merit, either of congruity or condignity. However, it can be called meritorious according to the covenant (pactum). It is not once (contra Horne) but at least twice that Turretin calls Adam’s obedience merit according to pact. Turretin explicitly states that Adam’s obedience would have been a meritorious cause of his obtaining life, understanding “meritorious” according to the terms of the covenant.