Such subsidiary sciences are to the decipherer of the present day what old languages were to the antiquary of other days; they construe for him the words which he discovers, they give a richness and a truth-like complexity to the picture which he paints, even in cases where the particular detail they tell is not much.
Bagehot compares modern subsidiary sciences to ancient languages, emphasizing their role in understanding the present.
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But it is natural also that persons used to analyse political institutions should look at these anomalies with a little tenderness and a little interest.
These anomalies, in a hundred instances, mark the old boundaries of a constitutional struggle.
The casual line was traced according to the strength of deceased combatants; succeeding generations fought elsewhere; and the hesitating line of a half-drawn battle was left to stand for a perpetual limit.
At last it strikes you that they grew up, house by house, on the devious tracks of the old green lanes; and if you follow on to the existing fields, you may often find the change half complete.
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