Jonathan Franks struck the winner as Hartlepool United made it three wins on the spin.
Dagenham & Redbridge arrived at Victoria Park as unbeaten National League leaders but left empty-handed after the exquisite 75th-minute finish from Franks.
The Daggers had the better of the game biy could not get the better of the brilliant Scoptt Loach./
Boss Craig Harrison said 'same again' for Pools against the Eastenders who came to the Vic as the division's pacesetters.
Teenager Connor Simpson, who scored the third goal against Maidstone last Saturday, deservdly kept his place at the top of the attack.
The only change was on the bench, where Liam Donnelly returned from international duty with Northern Ireland U21, Kenton Richardson stepping down.
Loach needed to be at his best and was, again, in a breathless opening.
Ferrier was allowed to turn too easily in thye seventh minute, Loach saving superbly to his left and seconds later he repeated the trick to his right, keeping out a close-range effort from Kevin Lokko.
Pools went to the other end and came agonisingly close to taking the laeead, Keith Watson's header from Nicky Deverdics' corner crashing back off the crossbar.
Daggers attacked again and Fejiri Okenabirhe brought another fine save from Loach.
Ferrier was proving a handful and he played in Jake Howells in the 25th minute only for the offside flag to go up, Loach keeping out the shot anyway.
Dagenham were the better side and Okenabirhe went clean through in the 28th minute, Loach making another great stop.
Daggers made the better start again, Loach keeping out a 54th-minute Ferrier shot, again, before Watson made a timely block on a Lokko shot.
Pools had been under the cosh, conceding four corners, but they got the stat that mattered in the 75th minute, the first goal.
FRANKS got on the end of along ball forward and played the most delightful of finishes, clipping it into the far post.
The danger was not over at the other end and Loach saved a powerful Lokko header four minutes later.
HARTLEPOOL UNITED 1
DAGENHAM & REDBRIDGE 0
Pools: Loach, Magnay, Ledger, Watson, Deverdics (Donnelly 85), Featherstone, Hawkins, Woods, Rodney (Donaldson 67), Simpson (Oates 56), Franks.
Subs: Newton, Munns
Goals: Franks 75
Dagenham & Redbridge: Cousins, Ling, Robson, Lokko, Pennell (Nunn 71); Robinson, Boucaud; Okenabirhie (Romaine 74), Whitely (Adams 66), Howells; Ferrier.
Subs: Justham, N'Gala
Booked: Pennell 64
Referee: Thomas Bramall
Attendance: 3,366 (82 away)