/usr/include/BALL/QSAR/ is in libball1.4-dev 1.4.3~beta1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/BALL/QSAR/Model.h
/usr/include/BALL/QSAR/NMRDescriptors.h
/usr/include/BALL/QSAR/QSARData.h
/usr/include/BALL/QSAR/allModel.h
/usr/include/BALL/QSAR/aromaticityProcessor.h
/usr/include/BALL/QSAR/automaticModelCreator.h
/usr/include/BALL/QSAR/bayesModel.h
/usr/include/BALL/QSAR/classificationModel.h
/usr/include/BALL/QSAR/classificationValidation.h
/usr/include/BALL/QSAR/common.h
/usr/include/BALL/QSAR/configIO.h
/usr/include/BALL/QSAR/connectivityBase.h
/usr/include/BALL/QSAR/connectivityDescriptors.h
/usr/include/BALL/QSAR/descriptor.h
/usr/include/BALL/QSAR/exception.h
/usr/include/BALL/QSAR/featureSelection.h
/usr/include/BALL/QSAR/fitModel.h
/usr/include/BALL/QSAR/gpModel.h
/usr/include/BALL/QSAR/kernel.h
/usr/include/BALL/QSAR/kernelModel.h
/usr/include/BALL/QSAR/knnModel.h
/usr/include/BALL/QSAR/kpcrModel.h
/usr/include/BALL/QSAR/kplsModel.h
/usr/include/BALL/QSAR/latentVariableModel.h
/usr/include/BALL/QSAR/ldaModel.h
/usr/include/BALL/QSAR/libsvmModel.h
/usr/include/BALL/QSAR/linearModel.h
/usr/include/BALL/QSAR/logitModel.h
/usr/include/BALL/QSAR/mlrModel.h
/usr/include/BALL/QSAR/modelFactory.h
/usr/include/BALL/QSAR/nBModel.h
/usr/include/BALL/QSAR/nonlinearModel.h
/usr/include/BALL/QSAR/oplsModel.h
/usr/include/BALL/QSAR/partialChargeBase.h
/usr/include/BALL/QSAR/partialChargeDescriptors.h
/usr/include/BALL/QSAR/partialChargeProcessor.h
/usr/include/BALL/QSAR/pcrModel.h
/usr/include/BALL/QSAR/plsModel.h
/usr/include/BALL/QSAR/qsar.doc
/usr/include/BALL/QSAR/registry.h
/usr/include/BALL/QSAR/regressionModel.h
/usr/include/BALL/QSAR/regressionValidation.h
/usr/include/BALL/QSAR/ringPerceptionProcessor.h
/usr/include/BALL/QSAR/rrModel.h
/usr/include/BALL/QSAR/simpleBase.h
/usr/include/BALL/QSAR/simpleDescriptors.h
/usr/include/BALL/QSAR/snBModel.h
/usr/include/BALL/QSAR/sources.cmake
/usr/include/BALL/QSAR/statistics.h
/usr/include/BALL/QSAR/surfaceBase.h
/usr/include/BALL/QSAR/surfaceDescriptors.h
/usr/include/BALL/QSAR/svmModel.h
/usr/include/BALL/QSAR/svrModel.h
/usr/include/BALL/QSAR/validation.h