This is the North hand, his partner was Dealer.
W - N - E - S
1♦
1♥- P-1♠- P
2♠ - P - P -3♦
3♥-P-3♠-...P
P - 4♦ - P - P
P
1♦ showed 3+ diamonds, and NS say that once South has shown six diamonds with the 3♦ bid, and EW have settled in their spade fit, it's clear for North to bid 4♦
My questions are:
Does the slow pass over 3♠ suggest bidding on?
Is Pass a logical alternative to bidding 4♦