The Ghanian's 90th minute header secured a 1-0 victory for the Robins at home to Hartlepool United to stretch the Mark Yates' side run to four wins from the opening five matches. It is Cheltenham's best start to a league campaign in two decades.
Arthur, making his fifth appearance for Cheltenham, has now scored three in his last four games
for the Sky Bet League Two outfit.
Meanwhile Reece Brown made his Notts County debut during Sunday's 2-1 home defeat to Bristol City. The 18-year-old, who joined the Sky Bet League One outfit on a one-month youth loan on Thursday
, played 64 minutes with substitute Jay Emmanuel-Thomas scoring from the spot in the 90th minute to complete a second-half comeback for the visitors.
Elsewhere, in the Vanarama Conference, Nick Townsend played the duration of Lincoln City's 3-1 defeat at home to Torquay United on Saturday. It was the Solihull-born goalkeeper's sixth appearance in his second loan spell with The Imps having also featured in the 3-2 Bank Holiday Monday loss at FC Halifax Town.
Finally, in the Vanarama Conference North, midfielder Reece Webb was an unused sub for Brackley Town on Saturday. The 18-year-old third-year scholar joined Brackley on work experience terms on Friday
and watched on as his side lost 2-1 during their first-ever meeting at Chorley.