1)
For what were they scribes?
1.
Rashi: They wrote Divrei ha'Yamim (chronicles).
2.
Malbim: They wrote Divrei ha'Yamim, and all matters of the king and his judgments.
2)
What is the Mazkir?
1.
Rashi: He orders which case came first for judgment, so it should be judged first.
2.
Malbim: He wrote Sefer ha'Zichronos 1 .
1
Malbim (Esther 6:1): Sefer ha'Zichronos was the king's personal chronicles of matters that he wanted to remember. Alshich (ibid.) - it is like an index of Divrei ha'Yamim, to quickly find where a matter is mentioned there.
