The newspaper ad described could have been published in different eras of Texas history. An advertisement from 1911 corresponds with the early 20th century, while those concerning slavery pertain to the antebellum period, and the typewriter ad likely comes from the late 19th to early 20th century.
The era in Texas when the described newspaper ad might have been published can be determined by looking at the provided reference dates and historical contexts mentioned in the snippets. For instance, the ad for Ford's Model T from the New Orleans Times Picayune indicates an era after the car's initial introduction, which occurred in 1908. Since the ad is from 1911, it falls within the early 20th century, a period after the industrial revolution when automobile ownership was beginning to spread.
Meanwhile, the advertisement related to the escaped slaves from the Indiana Western Sun & General Advertiser in 1819, and the Louisville Daily Courier in 1858, would place those ads squarely in the antebellum period before the American Civil War when slavery was still prevalent in Southern states, including Texas.
Lastly, the advertisement for a typewriter marks a time when such technology was gaining popularity in offices, which would likely be in the late 19th to early 20th century, corresponding with the industrialization era of Texas and the broader United States. Combining this historical information allows for a more comprehensive understanding of the time frame for each ad's publication.