In just a few lines, the poem sets a quiet scene of grief and small comfort. The opening image works two ways: an anchor is dropped to hold a boat steady, and the speaker lets his grief fall in the same motion. It's as if sorrow is something heavy he can finally set down, or something that now holds him in place. The poem doesn't say what the grief is about, and that silence leaves it open.
Then the tone shifts. The speaker calls himself "a poor man" who is "glad to have / a lobster with / my wife." Lobster suggests a treat, and the word "poor" gives it extra weight: this is a modest pleasure, not something to take for granted. The line breaks slow the ending down, so "my wife" arrives last, as the real source of the gladness. The mood is gentle and humble. Grief hasn't gone, but it sits alongside gratitude, and being together matters most.