Chessical: A contemporary account of this game:
In the contest between Steinitz and Gunsberg, the fourth game...proved the most interesting thus far in the contest. From the beginning to the end, Gunsberg, who played white, kept the attack in hand, while, correspondingly with his development, his antagonist was compelled to withdraw his forces, and restrict his movements.
At the adjournment the position was such that few people would have hesitated to pronounce black's game as lost, if it had been played by ordinary players. But with Steinitz defending it was a different thing. His tenacity and resources are great, and much curiosity is therefore felt
as to the result.
After the adjournment, Steinitz received Gunsberg's sealed move - <27.Nd2>
- which seemed to give him a great deal of trouble. From this point, he laboured heavily, consuming forty minutes for his next four or five moves, and running short of time in consequence. On the twenty-ninth move he gave up a pawn, and and his thirty-first he lost a piece, after which his struggles were of no avail, although he continued to the fifty-seventh
move, up to the point, indeed, when checkmate was inevitable.
Source: <Belfast News-Letter - Thursday 15 January 1891, p.3.>