 Keyes and his cousin @-@ in @-@ law Ambrose Rookwood spent the night before the planned explosion at the house of an Elizabeth More , near Temple Bar . They were visited late that evening by Fawkes ( in charge of the explosives beneath the House of Lords ) who collected a watch left by Percy , for timing the fuse . Several hours later , however , Fawkes was discovered guarding the explosives , and arrested . 
