Q1:

S₁: Moncure Conway devoted his life to two great objects freedom of thought, and freedom of the individual.

P : They threaten both kinds of freedom.

Q : But something also has been lost.

R : There are now dangers, somewhat different in form from those of the past ages.

S : In regard to both these objects, something has been gained since his time.

S₆: Unless a vigorous and vigilant public opinion can be aroused in defence of them, there will be much less of both a hundred years hence then there is now.

The Proper sequence should be:

Question

S₁:	Moncure Conway devoted his life to two great objects freedom of thought, and freedom of the individual.
P :	They threaten both kinds of freedom.
Q :	But something also has been lost.
R :	There are now dangers, somewhat different in form from those of the past ages.
S :	In regard to both these objects, something has been gained since his time.
S₆:	Unless a vigorous and vigilant public opinion can be aroused in defence of them, there will be much less of both a hundred years hence then there is now.

The Proper sequence should be:

Ordering of Sentences