Check this list by the charging slips at the counter.
For those still missing make a general but hasty search through the library.

Go over each part of the library in this way.

Then compile all lists of missing books into one list, arranged in the order of their call-numbers.

Once or twice a week for several months go over the library with this list, looking for missing books.

Even with access to the shelves, and with great freedom in matters of circulation, not many books will be found missing, under ordinary circumstances, at the end of a six months' search.