We got my VISA this morning! No letter was included, but my passport was on top and opened up to the VISA page and valid from December 29, 2014 to September 29, 2017. So excited and relieved to be able to finally make some solid plans.
Congratulations

!!
Yep, you don't get a letter when the visa has been approved... they only include a letter if it's refused, explaining the reasons for refusal.
The DHL prepaid envelope was also returned to us and although we later submitted a UPS account number for billing, we haven't yet been billed for the return of our documents. Maybe it takes a few days?
That could be the case. Did you manage to sort out a refund from DHL?
Just a note for others - you don't need to include binders or tabs - as they need to be able to reorganise and move your documents around easily. It's generally best to just send the papers as they are, but maybe with paperclips holding each section together.
Also, for others applying, you didn't actually need to include ANY the following (and they may not have even looked at any of it - they are not allowed to consider your employability for the visa at all):
- your husband's US passport copy
- My voter registration card (shows current address in US)
- My certificate of American Indian Blood
- My American Indian tribal membership card
- My birth certificate (original)
- My husband's birth certificate (certified copy)
- My husband's NHS number and NHS document
- Copy of my husband's US driver's license (not certified, but in color. Shows our address.)
- Copy of my US driver's license (not certified, but in color. Shows our address.)
- 2 published articles about me (playwright)
- Old resumes showing my work history at least ten years back
- Examples of my work contracts
- Letter of recommendation from old job
- Copy of grades from last year of college
- Proof of work registered in the United States under copyright laws
A couple of other notes:
This one is not normally needed, but it won't hurt to include it:
- Copy of passports from both of his parents (in color)
This one would actually be proof of relationship (living together), not proof of finances:
- Copies of our joint IRS filings for 2010, 2011, 2012 and 2013