Finding location of selection in InCopy [AppleScript]

Question

This is a variation of my request from yesterday. I am able to select the last character of the last column of the story. I now want to know the location of that character.
For example, I find the last character with this lin of code
select text of last character of last word of last text column of myStory
I then put the seleciton in a variable
set mySelection to selection of myDocument
mySelection is a list. The first object has the following definition:
text from character 1108 to character 1108 of story id 37515 of document id 7
But I cannot figure how to get the the character number (1108) into a variable.
Any ideas?

Answer 1

I have some of my answer. I set a variable to the index of the given character. See below.
tell application "Adobe InCopy CS5"
set myDocument to active document
set mySelection to selection of myDocument
set myTextObject to item 1 of mySelection
set myStory to parent story of myTextObject
set myOverset to overset text of myStory
set myText to index of last character of myTextObject
set howMany to count characters of myStory
select character 20 of myStory
end tell
Now to figure out how to select a selection of text.
This works:
select character 20 of myStory
This doesn't:
select characters 20 through 30 of myStory