The chart shows the ratio
between base money outstanding (blue bars) and gold bullion
(red bars) for the Bank of England, 1778-1844. This includes a
floating currency period in 1798-1821, and the return to a
gold standard system in 1821, so you can see how that looks
too. (This was similar to the 1914-1925 floating pound
period.) The gray line shows the ratio between the two, and as
you can see it was all over the place. Do you see something
that is "in direct proportion to the amount of money in
circulation"? No? That's because it didn't exist. Rueff is
making stuff up again.

I suppose the point here
is that you don't have to take some guy's word for it, you can
look yourself, and you might find -- usually -- that reality
is quite a bit different. One of the interesting things here
is that the gold reserves of the Issue Department were
£135.7m (i.e. the equivalent amount of gold calculated
at the parity price) in October 1931, after the British
devaluation. This was lower than earlier in that year, but it
is not particularly low. For example, it was £131.9m in
September 1929, when the 1920s boom was at its peak. Britain
did not devalue because it "ran out of gold." Rather, it
devalued because the people at the Bank of England did not
want to reduce the monetary base to support the pound's value,
believing this to be "restrictive" and thus an economic
negative. (It wouldn't have been negative, because the value
of the pound wouldn't have changed, unlike the 1920-1925
period when the pound's value was being purposefully raised.)
When the BoE was unwilling to do what was necessary to support
the value of the pound, according to gold standard operating
principles (the head of the Bank was on vacation at the time),
this naturally led to the devaluation of 1931. Undoubtedly,
people sensed at the time that the BoE was being rather
wishy-wahsy about its gold standard commitment from some
months or even years earlier, which of course would have led
to downward pressure on the pound.