Layer Estimates:

Layer: US_Lakes_1850 (ID:0)
Count: 18
Extent:

XMin: -13375275.0753577
YMin: 4715173.44487418
XMax: -7925738.68458923
YMax: 6445647.71840322
Spatial Reference: 102100 (3857)

Layer: US_Rivers_1850 (ID:1)
Count: 55
Extent:

XMin: -18341647.9921417
YMin: 2979964.75304408
XMax: -7546457.40438069
YMax: 11203410.5833303
Spatial Reference: 102100 (3857)