The black cap is a small square of black cloth worn, as you say, by a judge here when passing the death sentence. It is part of a judge's formal dress though the death penalty has been abolished .
Not only that but a barrister's gown still has the vestiges of the bag in which his own hood,what is now the 'cap', was carried; it is an irregular closed pocket hanging over the back on a black strap of cloth sewn to the shoulder of the gown. Laymen are often told that the bag served for the client to drop a guinea in while counsel was in Court, to encourage him to enthusiasm or to keep going

In that case it's a pity they sewed it up ! That is a myth.
The barrister's gown is itself black ( and so fitted with the 'bag') since the (royal) Court went into mourning at the death of a sovereign; the cap or hood would have been worn then . Never slow to save money, they never thereafter reverted to the normal, coloured,far more expensive gowns they had normally worn.
The monarch remembered is differently identified sometimes. I was brought up to believe it was Queen Anne (who died in 1714); the alternative was even earlier , so perhaps tutors lied in favour of her, lest anybody thought the profession was behind the times.

Covering the head as a sign of mourning is an old practice. The Israelites of the Old Testament,the Greeks and our Anglo-Saxon ancestors all did it.
It is also worn , by tradition, when the new Lord Mayor of London takes the oath at the Law Courts. The Lord Mayor changes every year on November 9th.I've no explanation for that a present; it may be that it symbolically marks the 'passing' of the outgoing Lord Mayor, who is sadly missed. They change every year , I always think, because a) it gives every Alderman a chance and b) it costs so much. The Mayor has many personal expenses incidental to his office, even that of providing luncheon for the senior judges in the Old Bailey courthouse every day

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( Of course, the judge could be in mourning for the victim ! It wouldn't explain the practice in cases of sheep- stealing or treason where no victim had died, though

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[This message was edited by FredPuli on 12-08-03 at 04:54 PM.]
[This message was edited by FredPuli on 12-08-03 at 04:59 PM.]