Four Young Explorers by Oliver Optic

The Guardian-Mother continued on her course without encountering either typhoon or other tempest, and her passengers kept very comfortable under the awnings. The ship was in about 10 deg. of north latitude and 110 deg. of east longitude. She was sailing with the wind nearly dead ahead, and therefore the breeze was good on deck, and even in the cabins.

At the appointed hour the passengers were in their chairs in Conference Hall, two of them occupied by the siamangs, and the baby in the lap of Miss Blanche, who had become very much attached to the little creature. On the frame in front of the orang-outang was a complete map of the Philippine Islands, covering seventeen degrees of latitude, and ten of longitude, with enough of the seas around them to make their position clear to the audience.