diff --git a/spec.txt b/spec.txt
index f9305554..1f6a81ed 100644
--- a/spec.txt
+++ b/spec.txt
@@ -3194,9 +3194,12 @@ with a following space, or (b) a single character `>` not followed by a space.
The following rules define [block quotes]:
1. **Basic case.** If a string of lines *Ls* constitute a sequence
- of blocks *Bs*, then the result of prepending a [block quote
+ of blocks *Bs*, then the result of prepending the same [block quote
marker] to the beginning of each line in *Ls*
- is a [block quote](#block-quotes) containing *Bs*.
+ is a [block quote](#block-quotes) containing *Bs*. If some lines in *Ls*
+ are [blank lines](@), then any block quote marker may be used on these
+ blank lines without affecting the interpretation of which block quote
+ marker was prepended.
2. **Laziness.** If a string of lines *Ls* constitute a [block
quote](#block-quotes) with contents *Bs*, then the result of deleting
@@ -3243,6 +3246,84 @@ baz
````````````````````````````````
+Indentation is determined by the shortest marker (on a non-blank line):
+
+```````````````````````````````` example
+>- - asdf
+>
+> - sdfg
+.
+
+
+
+````````````````````````````````
+
+
+The following is equivalent to the above (but now using the longer marker):
+
+```````````````````````````````` example
+> - - asdf
+>
+> - sdfg
+.
+
+
+
+````````````````````````````````
+
+
+List within a block quote, with the first item indented by three spaces:
+
+```````````````````````````````` example
+> 1. a
+>2. b
+.
+
+
+- a
+- b
+
+
+````````````````````````````````
+
+
+The shortest marker might not occur on the first line, meaning four spaces is too many:
+```````````````````````````````` example
+> 1. a
+>2. b
+.
+
+1. a
+
+
+- b
+
+
+````````````````````````````````
+
+
The `>` characters can be indented 1-3 spaces:
```````````````````````````````` example