Thank a lot.
I have checked the dictionary.There is no 'of one's own doing'. There is 'of one's own making'. Are they the same? Then in your example, can I change like this: the accident would not be of your own causing. This is what I think; maybe it is wrong. Accidents cannot be done; they are caused by something or someone. Am I right? Please correct me if I am wrong.
What does the underlined phrase mean? Could you give me another example using the underlined phrase?
Time and again, the city has taken hard knocks, through no fault of its own.