diff --git a/NEWS.md b/NEWS.md
index d59dbf5b..74027da1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,12 +1,12 @@
 # Quartet v1.0.0
 ## New features
- - Add functions to generate ternary plots from tree similarity measures
+ - Add functions to generate ternary plots from tree similarity measures.
  
 ## Improvements
- - Use tqDist for all quartet calculations
- - Remove single "splits" from splits objects
- - Simplify installation via github_install
- - Add missing details to documentation
+ - Use tqDist for all quartet calculations.
+ - Remove single "splits" from splits objects.
+ - Simplify installation via `github_install`.
+ - Add missing details to documentation.
  
 ## Modifications
  - Function `SimilarityMetrics` now takes the output of `QuartetStatus(trees)`,
diff --git a/R/Metrics.R b/R/Metrics.R
index b03a5aec..a616b6d7 100644
--- a/R/Metrics.R
+++ b/R/Metrics.R
@@ -21,7 +21,7 @@
 #' 
 #' * SemiStrict Joint Assertions (SSJA): _s_ / (_s_ + _d_ + _u_)
 #' 
-#' (The numerator of the Semistrict Joint Assertions similarity metric is given in
+#' (The numerator of the SemiStrict Joint Assertions similarity metric is given in
 #'  Estabrook _et al_. (1985)'s table 2 as _s_ + _d_, but this is interpreted, with
 #'  reference to their text, as a typographic error.)
 #' 
@@ -31,7 +31,7 @@
 #' * Steel & Penny's Quartet Metric (dQ): (_s_ + _u_) / _Q_
 #' 
 #' 
-#' Although defined using quartets, analagous values can be calculated using
+#' Although defined using quartets, analogous values can be calculated using
 #' partitions by replacing _s_ and _d_ with 2_s_ and (_d1_ + _d2_), 
 #' and _Q_ with _N_.
 #' Note that, for reasons listed elsewhere (see Smith 2019, supplementary text),
diff --git a/vignettes/Critical-distances.Rmd b/vignettes/Critical-distances.Rmd
index 80f4b67b..9d7a1a73 100644
--- a/vignettes/Critical-distances.Rmd
+++ b/vignettes/Critical-distances.Rmd
@@ -49,7 +49,8 @@ par(mar=rep(0.3, 4))
 plot(tree_b)
 ```
 
-Now create Tree C by adding a 6th tip as a sister to tip `3` on Tree A.  
+Now create Tree C by adding a 6<sup>th</sup> tip as a sister to tip `3` on Tree A.
+
 ```{r tree-c}
 tree_c <- ape::read.tree(text="((1, 2), ((3, 6), (4, 5)));")
 ```
diff --git a/vignettes/Tree-distance-metrics.Rmd b/vignettes/Tree-distance-metrics.Rmd
index 3fccfb49..9d711d53 100644
--- a/vignettes/Tree-distance-metrics.Rmd
+++ b/vignettes/Tree-distance-metrics.Rmd
@@ -72,7 +72,7 @@ Given two trees, is possible to calculate the difference in path length between
 each pair of tips.
 
 The path difference metric [@Steel1993; `r Phangorn('path.dist')`] is the 
-square root of the sum of squaresof each of these differences.
+square root of the sum of squares of each of these differences.
 
 ## Partition metric
 The Robinson-Foulds (RF or 'partition') metric [@Robinson1981; @Steel1993;