Sorry to be pedantic but please don't use white glue/copydex/pva. It is great stuff for mending modern things that you will never want to disassemble again but not very sympathetic to lovely old antique cases. If you get it where it shouldn't be and don't get it off in time it is permanent!
Use a old fashioned animal glue, sometime called pearl glue. It is water based and activated by heating to a little less that boiling temp in a double pan or similar. A lot of fuss perhaps but it is infinitely mend-able, can be soaked or steamed loose and is the stuff that your case was put together with originally.
As Balistix999 says, keep the glue thick or it may soak through the fabric. However, being water based a little careful sponging off with a warm damp sponge will remove any spillage.
