To find the Black's Law Dictionary in Westlaw start on the homepage and click on "Secondary Sources" under the All Content tab.
The link to Black's Law is found on the lefthand panel under Related Content.
To find the Illinois Practice Series in Westlaw start on the homepage and click on "Secondary Sources" under the All Content tab.
Scroll down to the "By State" section and select Illinois.
Under "Texts & Treatises" select Illinois Practice Series.