Scattered about the perimeter fence of the Tiwi Masonic Homes residential village and nursing home there used to be signs warning that the place was under surveillance. The passage of Cyclones Carlos and Grant blew some of those signs down. It took a long time for some of the signs to be relocated and tied back on the fence , which raised questions about the nature of the surveillance if the signs could disappear from public view and not be promptly replaced. Gradually, the warning signs disappeared completely except for one near the nursing home which lay flat on the ground in the bushes for many months , gradually being covered by leaves . The last of the Mohicans warning signs seemed to proclaim it was from a reputable international security organisation , even active in war zones , which has major responsibilities in the NT. On April 28 the Masonic Homes HQ in Adelaide was sent an email and asked to explain how the Tiwi Masonic Homes Security operates, how much it costs, etc . There has been no reply . The nursing home has been taken over by another organisation and there have been some staff changes .