Where did Dr. Frankenstein get the body parts for his monster?

In Chapter Three,says
that he "began the creation of a human being."  In order to achieve his goal, he
requires "lifeless matter" so that he can "renew life where death had apparently
devoted the body to corruption." In other words, he needs body parts, and so he must look
in all of the places one might find those parts: the morgue (the "charnel houses"
later referenced in chapter four), slaughter-houses, etc. He also says, in Chapter Three, that
he "dabbled among the unhallowed damps of the grave [and] tortured the living animal to
animate the lifeless clay." Thus, it sounds as though Victor actually did resort to digging
up fresh graves in order to plunder the bodies buried there.  

Importantly,
it is in his "pursu[it] of nature to her hiding places" (the morgue, the grave, and
other similar places that the average human eye avoids) that forces his "human nature to
turn with loathing from [his] occupation" (chapter three).