A friend at court

Also found in: Idioms.
Related to A friend at court: Friend of the court brief
one disposed to act as a friend in a place of special opportunity or influence.

See also: Friend

References in classic literature ?
Some time after, asking a friend at court how they came to fix on that determinate number, he told me that his majesty's mathematicians, having taken the height of my body by the help of a quadrant, and finding it to exceed theirs in the proportion of twelve to one, they concluded from the similarity of their bodies, that mine must contain at least 1724 of theirs, and consequently would require as much food as was necessary to support that number of Lilliputians.