Definition of "sufficiently"

Sunning himself on the board steps, I saw for the first time Mr. Farquhar Fenelon Cooke. […] A silver snaffle on a heavy leather watch guard which connected the pockets of his corduroy waistcoat, together with a huge gold stirrup in his Ascot tie, sufficiently proclaimed his tastes.

1897 December (indicated as 1898), Winston Churchill, chapter II, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.

I prefer to think that birds have a sufficiently developed sense of humour to enjoy the spectacle of a human being hunched beneath a bush kissing the back of their hand.

1980, Bill Oddie, Bill Oddie's Little Black Bird Book, page 112

Attempts by Waterloo signalmen to clear the points by power operation eventually exhausted point motor batteries, which are fed by trickle chargers, and a blown fuse accentuated the problem; thus, even when the points had been cleared of ice, no power was available to operate them until the batteries were sufficiently recharged.

1962 March, “The New Year Freeze-up on British Railways”, in Modern Railways, page 159