Dear Mrs. Wright,
Thank you for your letter dated 6th June which I'm afraid was only passed to my Department a few days ago.
I would be pleased to make further enquiries on your behalf about your brother's affairs if you are able to give me further information.
Specifically, I would need to know the name and address of the solicitors who were acting on his behalf, exact amounts of money involved and dates on which transactions were made and any correspondence you have had with solicitors and other offices with regard to this matter.
If you can let me have this information as soon as possible I will start to make some enquiries for you.
I do apologise for my delay in replying to your letter.