diff --git a/R/Prior.R b/R/Prior.R
index b32f61f3..a978a054 100755
--- a/R/Prior.R
+++ b/R/Prior.R
@@ -8,6 +8,7 @@ NULL
 #' constructors.
 #'
 #' @param centre (`number`)\cr the central point of distribution to shrink sampled values towards
+#' (for most distributions this is the mean or median if the mean is undefined)
 #' @param x ([`Prior`])\cr a prior Distribution
 #' @param object ([`Prior`])\cr a prior Distribution
 #' @param name (`character`)\cr the name of the parameter the prior distribution is for
@@ -58,7 +59,7 @@ NULL
 #' @param validation (`list`)\cr the prior distribution parameter validation functions. Must have
 #' the same names as the `paramaters` slot.
 #' @param sample (`function`)\cr a function to sample from the prior distribution.
-#' @param limits (`numeric`)\cr TODO
+#' @param limits (`numeric`)\cr the lower and upper limits for a truncated distribution
 #' @rdname Prior-class
 Prior <- function(
     parameters,
diff --git a/man/Prior-Shared.Rd b/man/Prior-Shared.Rd
index 218ae8e8..6f4cb023 100644
--- a/man/Prior-Shared.Rd
+++ b/man/Prior-Shared.Rd
@@ -4,7 +4,8 @@
 \alias{Prior-Shared}
 \title{\code{Prior} Function Arguments}
 \arguments{
-\item{centre}{(\code{number})\cr the central point of distribution to shrink sampled values towards}
+\item{centre}{(\code{number})\cr the central point of distribution to shrink sampled values towards
+(for most distributions this is the mean or median if the mean is undefined)}
 
 \item{x}{(\code{\link{Prior}})\cr a prior Distribution}
 
diff --git a/man/Prior-class.Rd b/man/Prior-class.Rd
index f06151b6..f666c2d6 100644
--- a/man/Prior-class.Rd
+++ b/man/Prior-class.Rd
@@ -34,7 +34,7 @@ the same names as the \code{paramaters} slot.}
 
 \item{sample}{(\code{function})\cr a function to sample from the prior distribution.}
 
-\item{limits}{(\code{numeric})\cr TODO}
+\item{limits}{(\code{numeric})\cr the lower and upper limits for a truncated distribution}
 }
 \description{
 Specifies the prior distribution in a Stan Model