Find Lower-Case But Maintain Letter?

I can find each paragraph that begins with a lower-case letter by searching for:

^13[a-z]

If modifying the surrounding character/s (removing the paragraph, for example), how do I maintain the original/existing lower-case letter? All my attempts so far have ended up with "[a-z]" within the text...

Basically I want to be able to turn this:

That was a.
great shot.

...into:

That was a great shot.

Thanks for any help!

Simple recorded macro with

1. .MatchWildcards = True

2. \. 'escapes' the end of sentence period since 'dot' can be a RegEx metacharacter

3. ^13 for the paragraph mark; ^10 if new line mark

4. 'Grouping' ( ) around the matching range a-z so that ...

5. ... the space+\1 in Replacement can refer to what was found in the first (only) grouping

Code:

---

Sub Macro3()
    Selection.Find.ClearFormatting
    Selection.Find.Replacement.ClearFormatting

    With Selection.Find
        .Text = "\.^13([a-z])"
        .Replacement.Text = " \1"
        .Forward = True
        .Wrap = wdFindContinue
        .Format = False
        .MatchCase = False
        .MatchWholeWord = False
        .MatchAllWordForms = False
        .MatchSoundsLike = False
        .MatchWildcards = True
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
End Sub

---

Excellent. Thanks so much!