Actually, guys, I think they are quoting from scholar A.E. Bailey's book "Daily Life in Bible Times," not the childrens book somebody linked to.
The best full quote I could find is “Paul’s general practice was to work at his trade from sunrise to 11 a.m., . . . then from 11 a.m. to 4 p.m. to preach in the hall, . . . and then lastly to make a house to house evangelistic canvass that lasted from 4 p.m. to far in the night.”
(sir82 seems to have beat me to posting about this)