/usr/include/evolution-3.10/calendar/ is in evolution-dev 3.10.4-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/evolution-3.10/calendar/gui/
/usr/include/evolution-3.10/calendar/gui/calendar-config-keys.h
/usr/include/evolution-3.10/calendar/gui/calendar-config.h
/usr/include/evolution-3.10/calendar/gui/calendar-view.h
/usr/include/evolution-3.10/calendar/gui/comp-util.h
/usr/include/evolution-3.10/calendar/gui/dialogs/
/usr/include/evolution-3.10/calendar/gui/dialogs/alarm-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/alarm-list-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/cancel-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/changed-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/comp-editor-page.h
/usr/include/evolution-3.10/calendar/gui/dialogs/comp-editor-util.h
/usr/include/evolution-3.10/calendar/gui/dialogs/comp-editor.h
/usr/include/evolution-3.10/calendar/gui/dialogs/copy-source-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/delete-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/delete-error.h
/usr/include/evolution-3.10/calendar/gui/dialogs/e-delegate-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/e-send-options-utils.h
/usr/include/evolution-3.10/calendar/gui/dialogs/event-editor.h
/usr/include/evolution-3.10/calendar/gui/dialogs/event-page.h
/usr/include/evolution-3.10/calendar/gui/dialogs/goto-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/memo-editor.h
/usr/include/evolution-3.10/calendar/gui/dialogs/memo-page.h
/usr/include/evolution-3.10/calendar/gui/dialogs/recur-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/recurrence-page.h
/usr/include/evolution-3.10/calendar/gui/dialogs/save-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/schedule-page.h
/usr/include/evolution-3.10/calendar/gui/dialogs/select-source-dialog.h
/usr/include/evolution-3.10/calendar/gui/dialogs/send-comp.h
/usr/include/evolution-3.10/calendar/gui/dialogs/task-editor.h
/usr/include/evolution-3.10/calendar/gui/dialogs/task-page.h
/usr/include/evolution-3.10/calendar/gui/e-alarm-list.h
/usr/include/evolution-3.10/calendar/gui/e-cal-config.h
/usr/include/evolution-3.10/calendar/gui/e-cal-event.h
/usr/include/evolution-3.10/calendar/gui/e-cal-list-view.h
/usr/include/evolution-3.10/calendar/gui/e-cal-model-calendar.h
/usr/include/evolution-3.10/calendar/gui/e-cal-model.h
/usr/include/evolution-3.10/calendar/gui/e-calendar-selector.h
/usr/include/evolution-3.10/calendar/gui/e-calendar-view.h
/usr/include/evolution-3.10/calendar/gui/e-cell-date-edit-text.h
/usr/include/evolution-3.10/calendar/gui/e-date-time-list.h
/usr/include/evolution-3.10/calendar/gui/e-day-view-layout.h
/usr/include/evolution-3.10/calendar/gui/e-day-view-main-item.h
/usr/include/evolution-3.10/calendar/gui/e-day-view-time-item.h
/usr/include/evolution-3.10/calendar/gui/e-day-view-top-item.h
/usr/include/evolution-3.10/calendar/gui/e-day-view.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-attendee.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-list-view.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-store.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-time-sel-item.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-time-sel.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-types.h
/usr/include/evolution-3.10/calendar/gui/e-meeting-utils.h
/usr/include/evolution-3.10/calendar/gui/e-select-names-editable.h
/usr/include/evolution-3.10/calendar/gui/e-select-names-renderer.h
/usr/include/evolution-3.10/calendar/gui/e-timezone-entry.h
/usr/include/evolution-3.10/calendar/gui/e-week-view-event-item.h
/usr/include/evolution-3.10/calendar/gui/e-week-view-layout.h
/usr/include/evolution-3.10/calendar/gui/e-week-view-main-item.h
/usr/include/evolution-3.10/calendar/gui/e-week-view-titles-item.h
/usr/include/evolution-3.10/calendar/gui/e-week-view.h
/usr/include/evolution-3.10/calendar/gui/e-weekday-chooser.h
/usr/include/evolution-3.10/calendar/gui/gnome-cal.h
/usr/include/evolution-3.10/calendar/gui/itip-utils.h
/usr/include/evolution-3.10/calendar/gui/misc.h
/usr/include/evolution-3.10/calendar/gui/tag-calendar.h