  Viewing the Knizhnik--Zamolodchikov equations as multi--time, nonautonomous
Shr\"odinger equations, the transformation to the Heisenberg representation is
shown to yield the quantum Schlesinger equations. These are the quantum form of
the isomonodromic deformations equations for first order operators of the form
$\DD_\l = {\di \over \di \l} - \wh{\NN}(\l)$, where $\wh{\NN}(\l)$ is a
rational $r\times r$ matrix valued function of $\l$ having simple poles only,
and the matrix entries are interpreted as operators on a module of the rational
$R$--matrix loop algebra $\wt{\frak{gl}}(r)_R$. This provides a simpler
formulation of a construction due to Reshetikhin, relating the KZ equations to
quantum isomonodromic deformations.
