"We were firm in the belief that the preaching of definite time was of God. It was this that led men to search the Bible diligently, discovering truths they had not before perceived. Jonah was sent of God to proclaim in the streets of Nineveh that within forty days the city would be overthrown; but God accepted the humiliation of the Ninevites, and extended their period of probation. Yet the message that Jonah brought was sent of God, and Nineveh was tested according to His will. The world looked upon our hope as a delusion, and our disappointment as its consequent failure; but though we were mistaken in the event that was to occur at that period, there was no failure in reality of the vision that seemed to tarry. LS 62.1"
"And Jonah began to enter into the city a day’s journey, and he cried, and said, Yet forty days, and Nineveh shall be overthrown."
EGW directly references Jonah's prophecy and its conditional nature to explain the Advent believers' experience. This is a clear and intentional allusion.
"Our disappointment was not so great as that of the disciples. When the Son of man rode triumphantly into Jerusalem, they expected Him to be crowned king. The people flocked from all the region about, and cried, “Hosanna to the Son of David.” Matthew 21:9 . And when the priests and elders besought Jesus to still the multitude, He declared that if they should hold their peace, even the stones would cry out, for prophecy must be fulfilled. Yet in a few days these very disciples saw their beloved Master, whom they believed would reign on David's throne, stretched upon the cruel cross above the mocking, taunting Pharisees. Their high hopes were disappointed, and the darkness of death closed about them. Yet Christ was true to His promises. Sweet was the consolation He gave His people, rich the reward of the true and faithful. LS 62.3"
"And the multitudes that went before, and that followed, cried, saying, Hosanna to the Son of David: Blessed is he that cometh in the name of the Lord; Hosanna in the highest."
EGW directly quotes and references Matthew 21:9.
"And he answered and said unto them, I tell you that, if these should hold their peace, the stones would immediately cry out."
EGW alludes to Luke 19:40, referencing the statement about the stones crying out.
"Where they crucified him, and two other with him, on either side one, and Jesus in the midst."
The EGW passage describes the crucifixion, which is directly described in John 19:18. The connection is valid.