The ghost cat of Fulham

For this mission I made my way down the river, past the lovely but battered Hammersmith Bridge, which had just closed down for all traffic the day before, to get some essentials for Mr L. I popped by, got a list and cash from Mr L, had a chat and set out to the local Iceland. Upon my return to Mr L's flat, as I entered I was certain I heard a cat, and said to Mr L: 'Did I just hear a cat somewhere?'. Mr L, laughing: 'There's no cat here'. He didn't seem at all surprised, telling me how this block of flats are often plagued by weird noises and happenings. He's got crosses above each door frame and a big rosary on the wall in the living room, but that didn't seem to keep the resident ghost cat away..