Folks:
Jumbo was a railroad station along the Delaware River Railroad that served a small community of cottages--probably not much more than fishing shacks--along both banks of Oldmans Creek flanking the movable railroad bridge over the same stream. It appears the original station may have stood on the Salem County side of this watercourse, but later moved to the Gloucester County side of the intercounty boundary line, but I can't be certain. The railroad may have closed the station in the winter since its patrons probably only alighted from the train there in the warmer months, but, again, I can't be certain.
Regarding its name, I cannot speak authoritatively. Neither the Salem County Historical Society nor the Gloucester County Historical Society list the answer to the name's origin in their respective pamphlets on place names. However, based on two stories in the 1967 pamphlet on Logan Township history, I can surmise its origin. The first story is about men "of foreign extraction" bringing around a "single large bear" in late September and early October of each year, presumably beginning in the late 1890s. I will quote verbatim from the story:
The men were sure that the children would dash home for money so they waited till the children returned before they had the bear perform. This bear was scraggly and quite old and just about able to move around. It had a muzzle with a ring attached to the nose by a long rope. By this arrangement the bear was controlled.
The children were warned by their parents in no uncertain terms to stay away from both the bear and the men. For the few pennies that were put in the hat which the men passed, the bear climbed a tree, rolled over and did tumblesaults much to the delight of the children.
Usually there was a performance in the early evening. ...By the next morning the men and the bear had departed for another town. Since they had to walk they did not cover many miles in a day.
Although the authors of the Logan pamphlet failed to link the above story with a second tale, I think the next story is too coincidental not to be connected. "The exact date is difficult to pinpoint. It was probably about 1900, give or take a little." It seems the morning train traveling north from Penns Grove spotted a bear somewhere between Center Square Station and Raccoon Creek. Stopping at Bridgeport Station, the engine crew reported the bear sighting and a group of men gathered in Center Square to hunt down the bear. The story fails to provide many details about the hunt and subsequent shooting, but I think the hunters shot the bear near the shore of Oldman's Creek. Furthermore, I think the "single large bear" mentioned in the first story answered to the name "Jumbo" and that the would be Nimrods shot the bear belonging to the men "of foreign extraction." Hence, the area received the name "Jumbo." This is my $0.02 worth.
Best regards,
Jerseyman
P.S. One or two of the fishing cabins still appear on the most recent edition of the USGS Chester, Pa--NJ topographical quadrangle map. However, in a quick check of the color ortho images used in Google Earth, I fail to find any of the buildings remaining in situ.