Merge Input Box Information with Column Information

Hello, does anybody know how to take information from an Input Box and merge it with information from a Column. It cannot delete the information from the Column it would just need to put an empty line between the information. I included a test sheet with the basic information I would have. When you hit the input button the Input Box will pop up. If I put in the Input Box that this is only a test then the first example will then say in Column E:
this is only a test
Hello

The information inputted in the input box would need to go into every file that has information in Column C. Any help is appreciated.
test macro.xlsm

Thanks Everybody this works xlbiznes. Mumps1 yours works also I was just trying to get the information to show up in the beginning of the cell instead of the end. But I need to know one other thing. How would I get it to put like an [Enter] space between the two pieces of information. I'm trying to get it to look like this so when I import it back into my database it shows up correctly.

New Information Placed on top
Orginal Information on Bottom

Right Now its showing up right besides each other.
Another Test Hello Hello Test

Maybe I'm looking at it wrong or I have a setting wrong.

I'm not sure if I understood properly but try this macro:

Private Sub CommandButton1_Click()
    'InputBox(prompt[, title] [, default] [, xpos] [, ypos] [, helpfile, context])
    Application.ScreenUpdating = False
    Dim bottomE As Integer
    bottomE = Range("E" & Rows.Count).End(xlUp).Row
    Dim rng As Range
    strname = InputBox("Write the note you want in Research Comments", "Research Comments")
    'Exit sub if Cancel button used or no text entered
    If strname = vbNullString Then
        MsgBox "You have not entered a note."
        Exit Sub
    Else
        For Each rng In Range("E2:E" & bottomE)
            rng = rng & " " & strname
        Next rng
    End If
End Sub

Hi Trevor. It looks like xlbiznes has answered your question. In reference to my code, change

rng = rng & " " & strname

to

rng = rng & Chr(10) & strname